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PBS News Hour
Has the market rally in biotech stocks hit a wall?
Thursday marked the single worst day for the Nasdaq since 2011. The once high-flying biotech and Internet shares tumbled, pulling the index below 4000 on Friday for the first time since Feb. 3. Hari Sreenivasan talks to Hugh Johnson of Hugh Johnson Advisors about what's behind investors' jitters and why tech and biotech tend to be more volatile than other stocks.
