FLAHERTY & CRUMRINE PREFERRED INCOME OPPORTUNITY FUND

To the Shareholders of Flaherty & Crumrine Preferred Income Opportunity Fund:

     The Fund delivered a second consecutive quarter of double-digit returns as
financial markets continued to recover from lows hit earlier this year. During
the three-month period ended August 31st, total return on net asset value was
+25.2%, and total return on market value of Fund shares was +12.9%.

     As the worst of the financial crisis appears to be behind us, prices on
most securities in the Fund's portfolio rose during the quarter. Although the
credit outlook for some issuers remains speculative and the prices of their
securities remain depressed, many securities that suffered the biggest declines
earlier in the year staged the most dramatic recoveries. That being said, while
prices in general are much higher than just three months ago, they remain well
below the highs reached in recent years. There should be further recovery if the
markets continue to normalize as we expect.

     The strong performance over the past two quarters occurred despite the
negative impact of our investments in a few troubled companies. During the past
quarter, Colonial Bank was shut down by regulators. At this point, we are
assuming there will be no additional income earned and minimal principal
recovery on our investment in its parent, Colonial BancGroup, Inc. Two
additional credits, FBOP Bancorp and CIT Group, suspended distributions on the
securities owned by the Fund. Both companies are currently exploring strategies
to improve their financial condition.

     One year ago, the world's financial system was on the brink of collapse. In
the blink of an eye, we went from a world in which anyone with a pulse could get
a loan to a virtual shutdown of the capital markets. Investors, large and small,
appeared ready to stuff money in a mattress rather than hand it over to a bank
or money market fund. Access to short-term liquidity, the life blood of
business, largely disappeared, and long-term financing was virtually
unobtainable. Banks simply stopped lending (not only to long-time customers, but
even more troublesome, to other banks), and capital market investors were in no
mood to provide new financing.

     When compared to broader credit markets, the preferred market has a much
greater concentration in financial companies. In addition, the majority of
preferred issues are long-term and consequently tend to have more volatile
prices than other fixed-income instruments. As a result, the performance of the
preferred market (and the Fund) was dismal throughout the early part of the
financial crisis.

     After one year, and massive amounts of government intervention, we see
signs of recovery and perhaps a greater sense of rationality in the markets. On
more than one occasion we've expressed our opinion that market volatility was
exacerbated by excessive amounts of leverage. We underestimated the extent to
which price declines could trigger selling by over-leveraged investors,
producing an accelerating downward price spiral. We learned some valuable
lessons during this financial chaos. We improved our analytic tools (and
hopefully developed a more refined sense of smell) to help us discern changes in
fundamental value from a leverage-fed frenzy. We further refined our credit
criteria to help us identify riskier issuers earlier in the credit cycle. And,
as leveraged investors ourselves, we have a keener appreciation for liquidity in
the Fund's portfolio.

     We believe these lessons will improve ongoing management of the Fund. Don't
expect wholesale changes, but we would not be doing our job if we did not adapt
to this new, more turbulent environment. For instance, the Fund suspended its
hedging strategy last year, not because we no longer believe in hedging but
because we did not think it would work in a crisis environment. At some point in
the future, we anticipate reinstating the Fund's hedging strategy. Similarly, we
have increased the portfolio's emphasis on liquid issues and issuers. By doing
so, the Fund may give up some current income, but we believe this provides
greater flexibility in managing the portfolio and its leverage for the benefit
of shareholders.



     In our last letter we indicated that the Fund was in the process of
replacing all remaining shares of Auction Preferred Stock with bank debt. The
switch is complete and the Fund's leverage is now comprised entirely of debt.
While the breakdown in the auction preferred stock market made the change
necessary, the Fund already is realizing some benefits from the new leverage.
Foremost among these benefits are lower borrowing expense and greater
flexibility in managing the portfolio.

     All markets have endured tremendous upheaval over the past year. More
change is on the horizon, as the financial system moves from crisis to recovery.
The Fund will continue to assess and adapt to this new market environment. We
take that responsibility seriously, and we appreciate the support that
shareholders have given us.

     More information is always available on the Fund's website, including
discussion of many of the topics in this letter. In addition, our thoughts on
the economic outlook are published quarterly and posted to the site. We
encourage you to visit the website at www.preferredincome.com.

Sincerely,


/s/ Donald F. Crumrine                  /s/ Robert M. Ettinger

Donald F. Crumrine                      Robert M. Ettinger
Chairman of the Board                   President

October 15, 2009


                                        2



              Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated

                                                              PORTFOLIO OVERVIEW

                                                     AUGUST 31, 2009 (UNAUDITED)

FUND STATISTICS ON 8/31/09


                               
Net Asset Value                   $      7.00
Market Price                      $      6.66
Discount                                 4.86%
Yield on Market Price                    9.01%
Common Stock Shares Outstanding    11,906,765




MOODY'S RATINGS           % OF NET ASSETS+
---------------           ----------------
                       
AA                               0.3%
A                               17.8%
BBB                             56.2%
BB                              20.2%
Below "BB"                       1.0%
Not Rated                        2.9%
                                ----
Below Investment Grade*         16.2%


*    BELOW INVESTMENT GRADE BY BOTH MOODY'S AND S&P.

                                   (PIE CHART)



INDUSTRY CATEGORIES   % OF NET ASSETS+
-------------------   ----------------
                   
Financial Services            1%
Other                         2%
Banking                      39%
Utilities                    26%
Insurance                    24%
Energy                        8%




TOP 10 HOLDINGS BY ISSUER    % OF NET ASSETS+
-------------------------    ----------------
                          
Banco Santander                    5.3%
Liberty Mutual Group               5.1%
Metlife                            4.6%
Sovereign Bancorp                  4.6%
Southern California Edison         3.9%
Goldman Sachs                      3.6%
Comerica                           3.5%
Capital One Financial              3.5%
Dominion Resources                 3.1%
Interstate Power & Light           3.0%




                                                                                           % OF NET ASSETS**+
                                                                                           ------------------
                                                                                        
Holdings Generating Qualified Dividend Income (QDI) for Individuals                                45%
Holdings Generating Income Eligible for the Corporate Dividends Received Deduction (DRD)           34%


**   THIS DOES NOT REFLECT YEAR-END RESULTS OR ACTUAL TAX CATEGORIZATION OF FUND
     DISTRIBUTIONS. THESE PERCENTAGES CAN, AND DO, CHANGE, PERHAPS
     SIGNIFICANTLY, DEPENDING ON MARKET CONDITIONS. INVESTORS SHOULD CONSULT
     THEIR TAX ADVISOR REGARDING THEIR PERSONAL SITUATION.

+    NET ASSETS INCLUDES ASSETS ATTRIBUTABLE TO THE USE OF LEVERAGE.


                                       3



Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated

PORTFOLIO OF INVESTMENTS

AUGUST 31, 2009 (UNAUDITED)



SHARES/$ PAR                                                                                            VALUE
------------                                                                                        ------------
                                                                                              
PREFERRED SECURITIES -- 96.4%
               BANKING -- 38.6%
$  3,000,000   Astoria Capital Trust I, 9.75% 11/01/29, Series B ..............................     $  3,012,129
               Banco Santander:
      21,100      Adj. Rate Pfd. ..............................................................          333,011**(1)(2)
     235,750      6.50% Pfd. ..................................................................        5,458,202**(1)(2)
      22,750      6.80% Pfd. ..................................................................          548,332**(1)(2)
$  2,250,000   Barclays Bank PLC, 6.278% ......................................................        1,600,312**(1)(2)
      45,000   BB&T Capital Trust VI, 9.60% Pfd. ..............................................        1,178,100(1)
$  5,300,000   Capital One Capital III, 7.686% 08/15/36 .......................................        4,187,000(1)
               CIT Group, Inc.:
      22,500      5.189% Pfd., Series B .......................................................           97,735*+
     211,200      6.35% Pfd., Series A ........................................................          583,440*+
      45,000   Cobank, ACB, 7.00% Pfd., 144A**** ..............................................        1,570,783*(1)
$  4,500,000   Colonial BancGroup, 7.114%, 144A**** ...........................................           78,750+
$  6,170,000   Comerica Capital Trust II, 6.576% 02/20/37 .....................................        4,257,300(1)
       4,500   FBOP Corporation, Adj. Rate Pfd., 144A**** .....................................          192,656*+
         890   First Republic Preferred Capital Corporation, 10.50% Pfd., 144A**** ............          805,450
      22,500   First Republic Preferred Capital Corporation II, 8.75% Pfd.,
                  Series B, 144A**** ..........................................................          492,892
       2,500   First Tennessee Bank, Adj. Rate Pfd., 144A**** .................................        1,013,281*(1)
$    500,000   First Tennessee Capital II, 6.30% 04/15/34, Series B ...........................          282,724
               Goldman Sachs:
$  4,600,000      Capital II, 5.793% ..........................................................        3,381,000(1)
          11      Pass-Through Certificates, Class B, 144A**** ................................          182,600*+
       3,500      STRIPES Custodial Receipts, Pvt. ............................................          721,000*
               HSBC USA, Inc.:
     176,000      Adj. Rate Pfd., Series G ....................................................        3,284,600*(1)
       2,500      $2.8575 Pfd. ................................................................           96,750*(1)
      15,300   Keycorp Capital VIII, 7.00% Pfd. 06/15/66 ......................................          293,951
      10,000   Keycorp Capital X, 8.00% Pfd. ..................................................          213,650
$    450,000   Lloyds Banking Group PLC, 6.657%, 144A**** .....................................          193,822**(2)
      28,000   PFGI Capital Corporation, 7.75% Pfd. ...........................................          656,250(1)
      99,000   PNC Financial Services, 9.875% Pfd., Series F ..................................        2,635,628*(1)
$    300,000   PNC Preferred Funding Trust III, 8.70%, 144A**** ...............................          264,694(1)
     122,700   Sovereign Bancorp, 7.30% Pfd., Series C ........................................        2,934,064*(1)
       9,875   Sovereign Capital Trust V, 7.75% Pfd. 05/22/36 .................................          226,458(1)



                                       4





                                       Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated

                                                                      PORTFOLIO OF INVESTMENTS (CONTINUED)

                                                                               AUGUST 31, 2009 (UNAUDITED)

SHARES/$ PAR                                                                                     VALUE
------------                                                                                 ------------
                                                                                          
PREFERRED SECURITIES -- (CONTINUED)
               BANKING -- (CONTINUED)
       2,600   Sovereign REIT, 12.00% Pfd., Series A, 144A**** ...........................    $  2,346,500
               U.S. Bancorp, Auction Pass-Through Trust, Cl. B:
           9      Series 2006-5, Variable Rate Pfd., 144A**** ............................             225*+
           9      Series 2006-6, Variable Rate Pfd., 144A**** ............................             225*+
$    900,000   Washington Mutual, 9.75%, 144A**** ........................................          13,500++
$  1,400,000   Webster Capital Trust IV, 7.65% 06/15/37 ..................................         826,000(1)
               Wells Fargo & Company:
$  2,000,000      7.98%, Series K ........................................................       1,810,000*(1)
      22,500      8.00% Pfd., Series J ...................................................         552,375*(1)
                                                                                              ------------
                                                                                                46,325,389
                                                                                              ------------
               FINANCIAL SERVICES -- 0.5%
$    250,000   Ameriprise Financial, Inc., 7.518% 06/01/66 ...............................         196,250(1)
$    500,000   General Electric Capital Corporation, 6.375% 11/15/67 .....................         404,356
               Lehman Brothers Holdings, Inc.:
      45,800      5.67% Pfd., Series D ...................................................          16,946*++
       9,500      5.94% Pfd., Series C ...................................................           3,135*++
      25,000      6.50% Pfd., Series F ...................................................           2,813*++
      13,400      7.95% Pfd. .............................................................           1,273*++
                                                                                              ------------
                                                                                                   624,773
                                                                                              ------------
               INSURANCE -- 21.8%
$  1,000,000   Ace Capital Trust II, 9.70% 04/01/30 ......................................       1,003,484(1)(2)
               Arch Capital Group Ltd.:
      12,400      7.875% Pfd., Series B ..................................................         284,239**(1)(2)
      22,000      8.00% Pfd., Series A ...................................................         535,315**(1)(2)
               AXA SA:
$  1,200,000      6.379%, 144A**** .......................................................         894,000**(1)(2)
$  3,000,000      6.463%, 144A**** .......................................................       2,235,000**(1)(2)
      29,700   Axis Capital Holdings, 7.50% Pfd., Series B ...............................       1,936,069(1)(2)
      90,000   Delphi Financial Group, 7.376% Pfd. 05/15/37 ..............................       1,552,500(1)
$  3,250,000   Everest Re Holdings, 6.60% 05/15/37 .......................................       2,291,250(1)
               Liberty Mutual Group:
$  2,000,000      7.80% 03/15/37, 144A**** ...............................................       1,430,000(1)
$  4,400,000      10.75% 06/15/58, 144A**** ..............................................       3,938,000(1)
$    467,000   MetLife Capital Trust IV, 7.875% 12/15/37, 144A**** .......................         417,965(1)
$  4,133,000   MetLife Capital Trust X, 9.25% 04/08/38, 144A**** .........................       4,029,212(1)
$  1,000,000   MetLife, Inc., 10.75% 08/01/39 ............................................       1,127,917(1)



                                       5



Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated

PORTFOLIO OF INVESTMENTS (CONTINUED)

AUGUST 31, 2009 (UNAUDITED)



SHARES/$ PAR                                                                                            VALUE
------------                                                                                        ------------
                                                                                              
PREFERRED SECURITIES -- (CONTINUED)
               INSURANCE -- (CONTINUED)
               Principal Financial Group:
       5,000      5.563% Pfd., Series A .......................................................     $    317,500*
      72,700      6.518% Pfd., Series B .......................................................        1,319,687*(1)
               Renaissancere Holdings Ltd.:
      56,050      6.08% Pfd., Series C ........................................................        1,041,409**(1)(2)
      12,900      6.60% Pfd., Series D ........................................................          264,192**(1)(2)
      10,700      7.30% Pfd., Series B ........................................................          234,785**(2)
     115,500   Scottish Re Group Ltd., 7.25% Pfd. .............................................          284,419**(2)+
$  1,060,000   USF&G Capital, 8.312% 07/01/46, 144A**** .......................................        1,019,184(1)
                                                                                                    ------------
                                                                                                      26,156,127
                                                                                                    ------------
               UTILITIES -- 25.6%
       6,579   Baltimore Gas & Electric Company, 6.70% Pfd., Series 1993 ......................          585,531*(1)
       2,780   Central Vermont Public Service Corporation, 8.30% Sinking Fund Pfd., Pvt. ......          281,141*
               Dominion Resources, Inc.:
$  2,700,000      7.50% .......................................................................        2,216,781(1)
      56,500      8.375% Pfd., Series A .......................................................        1,497,250(1)
               Georgia Power Company:
       3,555      6.125% Pfd. .................................................................           86,253*(1)
       5,000      6.50% Pfd., Series 2007A ....................................................          480,469*(1)
               Gulf Power Company:
      16,500      6.00% Pfd., Series 1 ........................................................        1,335,578*(1)
      13,000      6.45% Pfd., Series 2007A ....................................................        1,219,121*(1)
      30,500   Indianapolis Power & Light Company, 5.65% Pfd. .................................        2,446,673*(1)
     129,900   Interstate Power & Light Company, 8.375% Pfd., Series B ........................        3,645,319*(1)
               Pacific Enterprises:
      15,935      $4.50 Pfd. ..................................................................        1,220,023*(1)
       8,935      $4.75 Pfd., Series 53 .......................................................          710,054*(1)
$  1,500,000   PECO Energy Capital Trust III, 7.38% 04/06/28, Series D ........................        1,275,346(1)
$  4,500,000   Puget Sound Energy, Inc., 6.974% 06/01/67 ......................................        3,613,023(1)
      60,000   Southern California Edison, 6.00% Pfd., Series C ...............................        4,726,878*(1)
$  2,780,000   Southern Union Company, 7.20% 11/01/66 .........................................        2,091,950
   $ 750,000   TXU Electric Capital V, 8.175% 01/30/37 ........................................          341,250
               Union Electric Company:
       5,700      4.56% Pfd. ..................................................................          380,475*
      10,156      $7.64 Pfd. ..................................................................          987,989*(1)
$  2,000,000   Wisconsin Energy Corporation, 6.25% 05/15/67 ...................................        1,582,262(1)
                                                                                                    ------------
                                                                                                      30,723,366
                                                                                                    ------------



                                       6





                                         Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated

                                                                        PORTFOLIO OF INVESTMENTS (CONTINUED)

                                                                                 AUGUST 31, 2009 (UNAUDITED)

SHARES/$ PAR                                                                                      VALUE
------------                                                                                   ------------
                                                                                              
PREFERRED SECURITIES -- (CONTINUED)
               ENERGY -- 7.9%
$  4,000,000   Enbridge Energy Partners LP, 8.05% 10/01/37 .................................   $  3,379,916(1)
               Enterprise Products Partners:
$  1,000,000      7.034% 01/15/68 ..........................................................        821,217
$  2,460,000      8.375% 08/01/66, Series A ................................................      2,136,709
       3,000   Kinder Morgan GP, Inc., 8.33% Pfd., 144A**** ................................      2,738,625*
   $ 500,000   Teppco Partners LP, 7.00% 06/01/67 ..........................................        397,212
                                                                                               ------------
                                                                                                  9,473,679
                                                                                               ------------
               MISCELLANEOUS INDUSTRIES -- 2.0%
      35,000   Ocean Spray Cranberries, Inc., 6.25% Pfd., 144A**** .........................      2,338,438*(1)
                                                                                               ------------
                                                                                                  2,338,438
                                                                                               ------------
               TOTAL PREFERRED SECURITIES
                  (Cost $ 138,451,863) .....................................................    115,641,772
                                                                                               ------------
CORPORATE DEBT SECURITIES -- 2.0%
               FINANCIAL SERVICES -- 0.2%
      10,000   Ameriprise Financial, Inc., 7.75% 06/15/39 ..................................        240,025(1)
                                                                                               ------------
                                                                                                    240,025
                                                                                               ------------
               INSURANCE -- 1.8%
$  1,050,000   Liberty Mutual Insurance, 7.697% 10/15/97, 144A**** .........................        699,238(1)
$  2,000,000   UnumProvident Corporation, 7.25% 03/15/28, Senior Notes .....................      1,485,472(1)
                                                                                               ------------
                                                                                                  2,184,710
                                                                                               ------------
               TOTAL CORPORATE DEBT SECURITIES
                  (Cost $ 2,467,177) .......................................................      2,424,735
                                                                                               ------------
MONEY MARKET FUND -- 0.6%
     738,696   BlackRock Provident Institutional, T-Fund ...................................        738,696
                                                                                               ------------
               TOTAL MONEY MARKET FUND
                  (Cost $738,696) ..........................................................        738,696
                                                                                               ------------



                                       7



Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated

PORTFOLIO OF INVESTMENTS (CONTINUED)

AUGUST 31, 2009 (UNAUDITED)



                                                                                                        VALUE
                                                                                                    ------------
                                                                                              
TOTAL INVESTMENTS (Cost $141,657,736***) ..............................................    99.0%    $118,805,203
OTHER ASSETS AND LIABILITIES (Net) ....................................................     1.0%       1,188,361
                                                                                          -----     ------------
NET ASSETS BEFORE LOAN ................................................................   100.0%+++ $119,993,564
                                                                                          -----     ------------
LOAN PRINCIPAL BALANCE ................................................................              (36,600,000)
                                                                                                    ------------
TOTAL NET ASSETS AVAILABLE TO COMMON STOCK ............................................             $ 83,393,564
                                                                                                    ============


----------
*    Securities eligible for the Dividends Received Deduction and distributing
     Qualified Dividend Income.

**   Securities distributing Qualified Dividend Income only.

***  Aggregate cost of securities held.

**** Securities exempt from registration under Rule 144A of the Securities Act
     of 1933. These securities may be resold in transactions exempt from
     registration to qualified institutional buyers. At August 31, 2009, these
     securities amounted to $26,895,040 or 22.4% of net assets. These securities
     have been determined to be liquid under the guidelines established by the
     Board of Directors.

(1)  All or a portion of this security is pledged as collateral for the Fund's
     loan. The total value of such securities was $95,889,241 at August 31,
     2009.

(2)  Foreign Issuer.

+    Non-income producing.

++   The issuer has filed for bankruptcy protection. As a result, the Fund may
     not be able to recover the principal invested and also does not expect to
     receive income on this security going forward.

+++  The percentage shown for each investment category is the total value of
     that category as a percentage of net assets before the loan.

ABBREVIATIONS:

PFD.    -- Preferred Securities
PVT.    -- Private Placement Securities
REIT    -- Real Estate Investment Trust
STRIPES -- Structured Residual Interest Preferred Enhanced Securities


                                       8




                                Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated

                                    STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE TO COMMON STOCK(1)

                           FOR THE PERIOD FROM DECEMBER 1, 2008 THROUGH AUGUST 31, 2009 (UNAUDITED)

                                                                                          VALUE
                                                                                      ------------
                                                                                   
OPERATIONS:
   Net investment income ..........................................................   $  6,309,282
   Net realized gain/(loss) on investments sold during the period .................    (11,887,895)
   Change in net unrealized appreciation/depreciaton of investments ...............     39,124,086
   Distributions to APS* Shareholders from net investment income, including changes
      in accumulated undeclared distributions .....................................       (936,183)
                                                                                      ------------
   NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS ...........................     32,609,290
DISTRIBUTIONS:
   Dividends paid from net investment income to Common Stock Shareholders(2) ......     (5,339,094)
                                                                                      ------------
   TOTAL DISTRIBUTIONS TO COMMON STOCK SHAREHOLDERS ...............................     (5,339,094)
FUND SHARE TRANSACTIONS:
   Increase from shares issued under the Dividend Reinvestment and Cash
      Purchase Plan ...............................................................        375,985
                                                                                      ------------
   NET INCREASE IN NET ASSETS AVAILABLE TO COMMON STOCK RESULTING FROM FUND
      SHARE TRANSACTIONS ..........................................................        375,985
                                                                                      ------------
NET INCREASE IN NET ASSETS AVAILABLE TO COMMON STOCK FOR THE PERIOD ...............   $ 27,646,181
                                                                                      ============
NET ASSETS AVAILABLE TO COMMON STOCK:
   Beginning of period ............................................................   $ 55,747,383
   Net increase in net assets during the period ...................................     27,646,181
                                                                                      ------------
   End of period ..................................................................   $ 83,393,564
                                                                                      ============


----------
*    Auction Preferred Stock.

(1)  These tables summarize the nine months ended August 31, 2009 and should be
     read in conjunction with the Fund's audited financial statements, including
     footnotes, in its Annual Report dated November 30, 2008.

(2)  May include income earned, but not paid out, in prior fiscal year.


                                        9



Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated

FINANCIAL HIGHLIGHTS(1)

FOR THE PERIOD FROM DECEMBER 1, 2008 THROUGH AUGUST 31, 2009 (UNAUDITED)

FOR A COMMON STOCK SHARE OUTSTANDING THROUGHOUT THE PERIOD.


                                                                          
PER SHARE OPERATING PERFORMANCE:
   Net asset value, beginning of period ..................................   $      4.71
                                                                             -----------
INVESTMENT OPERATIONS:
   Net investment income .................................................          0.53
   Net realized and unrealized gain/(loss) on investments ................          2.29
DISTRIBUTIONS TO APS* SHAREHOLDERS:
   From net investment income ............................................         (0.08)
                                                                             -----------
   Total from investment operations ......................................          2.74
                                                                             -----------
DISTRIBUTIONS TO COMMON STOCK SHAREHOLDERS:
   From net investment income ............................................         (0.45)
                                                                             -----------
   Total distributions to Common Stock Shareholders ......................         (0.45)
                                                                             -----------
   Net asset value, end of period ........................................   $      7.00
                                                                             ===========
   Market value, end of period ...........................................   $      6.66
                                                                             ===========
   Common Stock shares outstanding, end of period ........................    11,906,765
                                                                             ===========
RATIOS TO AVERAGE NET ASSETS AVAILABLE TO COMMON STOCK SHAREHOLDERS:
   Net investment income+ ................................................         13.44%**
   Net investment income, including payments to APS Shareholders+ ........         11.44%**
   Operating expenses including interest expense .........................          2.64%**
   Operating expenses excluding interest expense .........................          2.47%**
SUPPLEMENTAL DATA:++
   Portfolio turnover rate ...............................................            47%***
   Net assets before loan, end of period (in 000's) ......................   $   119,994
   Ratio of operating expenses including interest expense(2) to net assets
      before loan and APS ................................................          1.60%**
   Ratio of operating expenses excluding interest expense(2) to net assets
      before loan and APS ................................................          1.49%**


(1)  These tables summarize the nine months ended August 31, 2009 and should be
     read in conjunction with the Fund's audited financial statements, including
     footnotes, in its Annual Report dated November 30, 2008.

(2)  Does not include distributions to APS Shareholders.

*    Auction Preferred Stock.

**   Annualized.

***  Not Annualized.

+    The net investment income ratios reflect income net of operating expenses,
     including interest expense.

++   Information presented under heading Supplemental Data includes APS and loan
     principal balance.


                                       10



              Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated

                                                FINANCIAL HIGHLIGHTS (CONTINUED)

                                           PER SHARE OF COMMON STOCK (UNAUDITED)



                         TOTAL                                   DIVIDEND
                       DIVIDENDS   NET ASSET       NYSE        REINVESTMENT
                          PAID       VALUE     CLOSING PRICE     PRICE(1)
                       ---------   ---------   -------------   ------------
                                                   
December 31, 2008 ..    $0.0500      $5.14         $4.60          $4.89
January 30, 2009 ...     0.0500       4.96          4.75           4.84
February 27, 2009 ..     0.0500       4.23          4.50           4.28
March 31, 2009 .....     0.0500       4.30          4.43           4.30
April 30, 2009 .....     0.0500       4.66          5.03           4.78
May 29, 2009 .......     0.0500       5.72          6.04           5.74
June 30, 2009 ......     0.0500       6.12          6.31           6.12
July 31, 2009 ......     0.0500       6.55          6.47           6.55
August 31, 2009 ....     0.0500       7.00          6.66           6.74


----------
(1)  Whenever the net asset value per share of the Fund's Common Stock is less
     than or equal to the market price per share on the reinvestment date, new
     shares issued will be valued at the higher of net asset value or 95% of the
     then current market price. Otherwise, the reinvestment shares of Common
     Stock will be purchased in the open market.


                                       11



Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated

NOTES TO FINANCIAL STATEMENTS (UNAUDITED)

1. AGGREGATE INFORMATION FOR FEDERAL INCOME TAX PURPOSES

     At August 31, 2009 the aggregate cost of securities for federal income tax
purposes was $141,843,044, the aggregate gross unrealized appreciation for all
securities in which there is an excess of value over tax cost was $8,242,130 and
the aggregate gross unrealized depreciation for all securities in which there is
an excess of tax cost over value was $31,279,971.

2. ADDITIONAL ACCOUNTING STANDARDS

     STATEMENT OF FINANCIAL ACCOUNTING STANDARDS NO. 157 "FAIR VALUE
 MEASUREMENTS" ("SFAS 157")

     In September 2006, the Financial Accounting Standards Board ("FASB") issued
Statement of Financial Accounting Standards No. 157 "Fair Value Measurements"
("SFAS 157") effective for fiscal years beginning after November 15, 2007. This
standard clarifies the definition of fair value for financial reporting,
establishes a framework for measuring fair value and requires additional
disclosures about the use of fair value measurements. The Fund has adopted SFAS
157 as of December 1, 2007. The three levels of the fair value hierarchy under
SFAS 157 are described below:

     -    Level 1 - quoted prices in active markets for identical securities

     -    Level 2 - other significant observable inputs (including quoted prices
                    for similar securities, interest rates, prepayment speeds,
                    credit risk, etc.)

     -    Level 3 - significant unobservable inputs (including the Fund's own
                    assumptions in determining the fair value of investments)

     In April 2009, FASB issued FASB Staff Position No. 157-4, "Determining Fair
Value when the Volume and Level of Activity for the Asset or Liability Have
Significantly Decreased and Identifying Transactions That Are Not Orderly",
("FSP 157-4"). FSP 157-4 is effective for fiscal years and interim periods
ending after June 15, 2009. FSP 157-4 provides additional guidance for
estimating fair value in accordance with SFAS 157, when the volume and level of
activity for the asset or liability have significantly decreased. FSP 157-4 also
includes guidance on identifying circumstances that indicate a transaction is
not orderly. FSP 157-4 requires entities to describe the inputs and valuation
techniques used to measure fair value and changes in those techniques and
related inputs during the period. FSP 157-4 expands the three-level hierarchy
disclosure and the level three-roll forward disclosure for each major security
type as described in paragraph 19 of SFAS 115, "Accounting for Certain
Investments in Debt and Equity Securities."


                                       12





                       Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated

                                    NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)

     The inputs or methodology used for valuing securities are not necessarily
an indication of the risk associated with investing in those securities. A
summary of the inputs used to value the Fund's net assets as of August 31, 2009
is as follows:

                                                               LEVEL 2        LEVEL 3
                                   TOTAL          LEVEL 1     SIGNIFICANT    SIGNIFICANT
                                 VALUE AT          QUOTED     OBSERVABLE    UNOBSERVABLE
                              AUGUST 31, 2009      PRICE        INPUTS         INPUTS
                              ---------------   -----------   -----------   ------------
                                                                
Preferred Securities
   Banking                      $ 46,325,389    $21,052,611   $25,080,122     $192,656
   Financial Services                624,773         24,167       600,606           --
   Insurance                      26,156,127      5,516,546    20,639,581           --
   Utilities                      30,723,366      5,228,822    25,494,544           --
   Energy                          9,473,679             --     9,473,679           --
   Miscellaneous Industries        2,338,438             --     2,338,438           --
Corporate Debt Securities          2,424,735        240,025     2,184,710           --
Money Market Fund                    738,696        738,696            --           --
                                ------------    -----------   -----------     --------
Total Investments               $118,805,203    $32,800,867   $85,811,680     $192,656
                                ============    ===========   ===========     ========


     The following is a reconciliation of Level 3 investments for which
significant unobservable inputs were used to determine fair value:



                                                             PREFERRED SECURITIES
                                                       -------------------------------
                                                       TOTAL INVESTMENTS     BANKING
                                                       -----------------   -----------
                                                                     
BALANCE AS OF 11/30/08 .............................      $        --      $        --
Accrued discounts/premiums .........................               --               --
Realized gain/(loss) ...............................               --               --
Change in unrealized appreciation/(depreciation) ...       (2,169,844)      (2,169,844)
Net purchases/(sales) ..............................               --               --
Transfer in and/or out of Level 3 ..................        2,362,500        2,362,500
                                                          -----------      -----------
BALANCE AS OF 8/31/09 ..............................      $   192,656      $   192,656



                                       13



Flaherty & Crumrine Preferred Income Opportunity Fund Incorporated

NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)

3. SECTION 19 NOTICES

     Section 19 of the Investment Company Act of 1940 requires registered
investment companies to include a notice with the payment of a dividend if a
portion of that dividend may come from sources other than undistributed net
income (other sources could include realized gains from the sale of securities
and non-taxable return of capital). Copies of the Section 19 notices for the
Fund are available on the website at www.preferredincome.com.

     The amounts and sources of distributions reported below are only estimates
and are not being provided for tax reporting purposes. Form 1099-DIV will be
sent to shareholders in January 2010 reporting the amount and tax
characterization of distributions for the 2009 calendar year.



                                                     SOURCE OF DISTRIBUTIONS AS OF 8/31/09
                                                     -------------------------------------
                                                          NET           NET        RETURN
                                                      INVESTMENT     REALIZED        OF
                                                        INCOME     CAPITAL GAINS   CAPITAL
                                                      ----------   -------------   -------
                                                                          
Calendar 2009 Percentage of Total Distributions ..       95.0%          0.0%         5.0%



                                       14



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                           (FLAHERTY & CRUMRINE LOGO)
                                PREFERRED INCOME
                                OPPORTUNITY FUND

                                    Quarterly Report


                                 August 31, 2009

                             www.preferredincome.com

DIRECTORS
     Donald F. Crumrine, CFA
          Chairman of the Board
     David Gale
     Morgan Gust
     Karen H. Hogan
     Robert F. Wulf, CFA

OFFICERS
     Donald F. Crumrine, CFA
          Chief Executive Officer
     Robert M. Ettinger, CFA
          President
     R. Eric Chadwick, CFA
          Chief Financial Officer,
          Vice President and Treasurer
     Chad C. Conwell
          Chief Compliance Officer,
          Vice President and Secretary
     Bradford S. Stone
          Vice President and
          Assistant Treasurer
     Laurie C. Lodolo
          Assistant Compliance Officer,
          Assistant Treasurer and
          Assistant Secretary

INVESTMENT ADVISER
     Flaherty & Crumrine Incorporated
     e-mail: flaherty@pfdincome.com

QUESTIONS CONCERNING YOUR SHARES OF FLAHERTY & CRUMRINE PREFERRED INCOME
OPPORTUNITY FUND?

     -    If your shares are held in a Brokerage Account, contact your Broker.

     -    If you have physical possession of your shares in certificate form,
          contact the Fund's Transfer Agent & Shareholder Servicing Agent --

               PNC Global Investment Servicing (U.S.) Inc.
               P.O. Box 43027
               Providence, RI 02940-3027
               1-800-331-1710

THIS REPORT IS SENT TO SHAREHOLDERS OF FLAHERTY & CRUMRINE PREFERRED INCOME
OPPORTUNITY FUND INCORPORATED FOR THEIR INFORMATION. IT IS NOT A PROSPECTUS,
CIRCULAR OR REPRESENTATION INTENDED FOR USE IN THE PURCHASE OR SALE OF SHARES OF
THE FUND OR OF ANY SECURITIES MENTIONED IN THIS REPORT.