The Hot Stock: Alexion Pharmaceuticals Climbs 3.3%

Alexion Pharmaceuticals (ALXN), a drug maker focused on rare diseases, ended Thursday at the top of the list of the best performing stocks in the S&P 500 index. The shares climbed almost 3.3%, or $3.78, to close at $118.35, compared to the S&P 500, which fell almost 16 points, or 0.7% to end at 2,328.95. […]