Andrew Left Associate’s SEC Deal May Threaten Short Seller (1)

One of Andrew Left’s close associates settled US Securities and Exchange Commission claims about his role in preparing tweets that misled investors, potentially raising legal pressure on the famed short seller.

Ryan Choi’s settlement, disclosed Tuesday in court documents, is the latest twist in US authorities’ ongoing civil and criminal cases against Left and his Citron Research. The short seller is widely known on Wall Street for his damning reports about companies he claimed — often correctly — were overpriced by the markets.

Choi, 35, agreed to return $1.6 million he illegally made by trading around Left’s tweets ...