Guardant Health lost 27% of its worth after releasing study on its colorectal cancer blood test


Guardant Health Inc. experienced its biggest single-day stock drop Friday after releasing the results of a study analyzing its blood test for colorectal cancer.

The stock price of the Redwood City-based biotechnology company (Nasdaq: GH) closed Friday at $30.06 a share, a 27% decline from where it started the day. At one point, the stock was down 31%.

Before Guardant went public with the results of its test study on Thursday, analysts were expecting an 85% accuracy result, according to a Citigroup…

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