Cerus, Alexion Pharmaceuticals and NantKwest were among the biotech movers in premarket trading on Tuesday.
Cerus (CERS) reported a narrower-than-expected loss for the 2016 third quarter after yesterday's market close.
Wall Street analysts are keeping an eye on the effect of the Rio Olympics on stocks across a variety of sectors, from restaurants to biotech.
Trade-Ideas LLC identified Cerus (CERS) as a weak on high relative volume candidate
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