Sector ETFs Swell in Size as Investors Get Tactical

Broad market exchange traded funds, such as the SPDR S&P 500 ETF (NYSEArca: SPY) and the Vanguard Total Stock Market ETF (NYSEArca: VTI), are good for just that: Broad market exposure. However, inflows to sector and industry ETFs suggest advisors and investors are increasingly willing to adopt...