Tiny Stocks Could Mean Big Gains for This Biotech ETF

On Thursday, the SPDR S&P Biotech ETF (NYSEArca: XBI) jumped 7.5% and touched a fresh all-time high on volume that was more than triple the daily average. None of the other four biotech ETFs were up more than 1.3%. The reason for XBI’s good fortune on Thursday is easy to explain. Intercept...