Stocks making the biggest moves in the premarket: AstraZeneca, RH, GameStop, Quest Diagnostics & more

Stocks making the biggest moves in the premarket: AstraZeneca, RH, GameStop, Quest Diagnostics & more

Take a look at some of the biggest movers in the premarket:AstraZeneca (AZN) - The drugmaker said it should know before the end of the year whether its experimental Covid-19 vaccine is effective, if it can resume clinical trials soon. Late-stage trials are currently suspended while an independent safety committee investigates an illness suffered by a trial participant.RH (RH) - RH reported quarterly profit of $4.90 per share, easily beating the consensus estimate of $3.41 a share. The parent of Restoration Hardware's revenue also beat estimates, with the luxury furniture retailer issuing an upbeat outlook and saying it now sees a path to 25% adjusted operating margins. It had previously projected its long term margins at about 20%.Zscaler (ZS) - Zscaler beat estimates by 2 cents a share, with quarterly