Biotech finishes week strong due to M&A

Biotech indexes outpaced the broader markets this week, thanks in part to a pair of large deals.

The NYSE Arca Biotechnology Index (BTK) and SPDR S&P Biotech ETF (XBI) both gained more than 8% for the week, while the BioCentury 100 was up about 7% and the NASDAQ Biotechnology Index (NBI) added just under 5%. ...