Shares of Atossa Therapeutics (NASDAQ: ATOS) were trading more than 22% higher as of 1:06 p.m. EDT Tuesday. Two factors could be behind its sharp stock price gain.
First, fund managers are likely buying shares ahead of Atossa's pending inclusion into the Russell 2000 and Russell 3000 indexes. Second, investors (especially those in the Reddit community) could be attempting to set off a gamma squeeze -- buying lots of short-dated call options in a way that pressures market makers to buy more shares, causing the underlying stock price to skyrocket.
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Why Atossa Therapeutics Stock Is Jumping Today