Impressive Bull Run in Biotech ETFs Causes Some to Take Pause
July 16, 2015 at 11:00 AM EDT
The biotechnology sector and related exchange traded funds are breaking out to new highs, but the rapid ascension has some worried about valuations. The iShares Nasdaq Biotechnology ETF (NasdaqGS: IBB), the largest biotech ETF by assets, has surged 27.9% year-to-date while the S&P 500 index has...