Silver Lining for Biotechnology ETFs After Pfizer Calls off Deal with Allergan

Pfizer (NasdaqGS: PFE) called off the deal with Allergan (NasdaqGS: AGN) on Wednesday, but there was a silver lining. Exchange traded funds that track the biotechnology sector surged as traders speculated that the two companies could court other merger targets. Biotechnology sector-related ETFs led...