Singapore ride-hailing firm Grab shares changed from up to down on its first day of trading.Grab had previously risen more than 18%.
Grab, Southeast Asia's biggest ride-hailing and food delivery firm,lists on Nasdaq on Thursday following its $40 billion merger with special-purpose acquisition company (SPAC) Altimeter Growth Corp.
The deal is the world's biggest ever by a blank-check company and the biggest U.S. listing by a Southeast Asian firm.