Mumbai, Oct. 3 -- The Nasdaq climbed 88.89 points (0.4%) to 22,844.05, the Dow rose 78.62 points (0.2%) to 46,519.72 and the S&P 500 inched up 4.15 points (0.1%) to 6,715.35.

Tech stocks pushed higher on optimism around the artificial intelligence trade, with Nvidia closing at a record high and AMD surging 3.5%. The momentum followed reports that OpenAI secured a $500 billion valuation through a $6.6 billion stock sale, making it the world's most valuable privately-owned company.

Meanwhile, Wall Street largely brushed off worries about the U.S. government shutdown, now in its second day. With Senate votes delayed until Friday due to Yom Kippur, key economic reports such as jobless claims and factory orders remain postponed, adding uncer...