The beleaguered biotech sector was under pressure again on Tuesday. The iShares Nasdaq Biotechnology ETF was off 6.4%, and looking at its worst one-day decline since Aug. 4, 2011, according to FactSet data. The embattled biotech sector, which had enjoyed three sessions of gains until a drop on Monday, has been under pressure since presidential hopeful Hillary Clinton, criticized the high price of specialty drugs. The sector also had been one of the best performers during the stock-market bull run, leaving many participants calling it overvalued and predicting a precipitous fall. Tuesday’s biotech slump was weighing on the broader Nasdaq Composite Index , which was down 54 points, or 1.1%–making it the worst performer on the day of the main three stock indexes.
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