Red-hot biotechnology and semiconductor ETFs are cooling dramatically. They led Friday's sell-off among sector equity funds, heading toward their second week of steep declines. That has analysts wringing their hands over what the red wash over biotech stocks means for investors. Is it an overdue correction for a frothy sector or a mere blip in the rally? IShares Nasdaq Biotechnology (IBB) dropped 2% intraday as it struggled to retake its 50-day
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