Third-Largest Biotech ETF Up 20% Year-to-Date

After slumping last year, the SPDR S&P Biotech ETF (NYSEArca: XBI), the third-largest biotechnology exchange traded fund, is up 20% year-to-date, putting the equal-weight biotechnology fund in a new bull market. Some market observers see more upside coming for the popular biotechnology ETF....