What happened
Shares of MacroGenics (NASDAQ: MGNX) were skyrocketing 27.8% higher as of 12:47 p.m. ET on Tuesday. The sharp gain appears to be related to insider buying of the stock. A filing to the U.S. Securities and Exchange Commission on June 17 revealed that MacroGenics CFO
Why MacroGenics Stock Is Skyrocketing Today

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