By Shashwat Chauhan and Pranav Kashyap (Reuters) -The S&P 500 wavered between gains and losses on Wednesday after a robust start to the week spurred by soft inflation data and the U.S.-China tariff truce, as investors watched for trade developments during Donald Trump’s tour of the Gulf states. Most megacap and growth stocks ticked up, with Nvidia among top gainers with a 3.3% jump. Advanced
