Twitter shares closed 18 percent lower after the social media company's disappointing quarterly report leaked early.
Twitter's first-quarter profit beat Wall Street's expectations but sales fell short of estimates. The social media company posted adjusted first-quarter earnings of 7 cents per share on revenue of $436 million.
Financial intelligence service Selerity posted four tweets after 3 p.m. ET Tuesday with what it said were first-quarter earnings, revenue and user figures. Twitter issued a press release about 25 minutes later confirming Selerity's figures.
The New York Stock Exchange said Tuesday afternoon that it is reviewing trades made at 3:47 p.m. ET.
The 18 percent slide marked Twitter's second-worst day ever, trailing only a 24 percent drop in February 2014. Twitter shares were choppy in extended trading.