U.S.-listed shares of robotaxi maker Pony AI (PONY) surged for a second straight session Wednesday after a prominent Nasdaq index tracking Chinese firms added the stock to its ranks.

The Nasdaq Golden Dragon China Index (HXC) on Monday added Pony AI to its ranks, now comprising 73 companies, the Guangzhou, China-based firm said. Other components include Alibaba Group (BABA), NetEase (NTES), JD.com (JD), electric vehicle maker NIO (NIO), offering traders exposure to China's economy through U.S.-listed stocks.

Pony AI's U.S.-listed shares rose 4% soon after markets opened Wednesday after jumping nearly 17% yesterday.

The autonomous driving company operates a fleet of roughly 300 vehicles and partnered with Uber (UBER) last month to add robotaxis to the ride-hailing giant's fleet. Pony AI reported nearly $14 million in revenue in the first quarter.

Investopedia requires writers to use primary sources to support their work. These include white papers, government data, original reporting, and interviews with industry experts. We also reference original research from other reputable publishers where appropriate. You can learn more about the standards we follow in producing accurate, unbiased content in our editorial policy.