A selloff in DiDi Global Inc.'s stock , after the China-based ride-hailing company disclosed a Securities and Exchange Commission probe into its June 2021 initial public offering, sent other U.S.-listed shares of China-based companies lower. DiDi's stock dropped 4.0% in premarket trading. The company's shareholders are set to vote on May 23 on the company's proposal to delist from the NYSE, and to list in Hong Kong instead, after Chinese regulators announced an investigation into alleged data-privacy violations. Elsewhere, shares of Alibaba Group Holding Ltd. /zigman2/quotes/201948298/composite BABA +3.56% shed 2.8% ahead of the open, Pinduoduo Inc. /zigman2/quotes/208876581/composite PDD +2.78% slid 3.3%, iQIYI Inc. /zigman2/quotes/203657421/composite IQ +2.52% dropped 1.7%, Nio Inc. /zigman2/quotes/204905836/composite NIO +3.84% fell 1.4% and JD.com Inc. /zigman2/quotes/205122565/composite JD -1.85% gave up 2.9%. The iShares MSCI China ETF /zigman2/quotes/206267952/composite MCHI -0.38% declined 2.0% premarket, while futures /zigman2/quotes/209948968/delayed ES00 +0.16% for the S&P 500 /zigman2/quotes/210599714/realtime SPX +0.16% rose 0.4%.