Stocks recover following volatile session

Biotech shares and the broader market ended Wednesday in the black following a volatile trading day which saw the Dow Jones Industrial Average lose more than 700 points in early trading.

The NYSE Arca Biotechnology Index (BTK), NASDAQ Biotechnology Index (NBI) and BioCentury 100 each gained about 3% while the SPDR S&P Biotech ETF (XBI) added 3.5%...