The Globe and Mail reports in its Wednesday edition that U.S. and Canadian stocks closed lower on Tuesday as renewed concerns over the artificial-intelligence boom weighed on technology stocks days before five of the sector's most high-profile companies were due to post quarterly results. A Reuters dispatch to The Globe says that semiconductor shares, which have surged over 40 per cent so far this year, weighed particularly heavily on the Nasdaq, which suffered its biggest daily percentage loss in a month. OpenAI missed internal targets for weekly users and revenue, raising concerns over the AI heavyweight's ability to support its massive spending on data centres, according to a report from the Wall Street Journal. Chip stocks also dropped; Nvidia-backed CoreWeave slid 5.8 per cent. "[OpenAI] is giving investors more food for thought, whether the growth is slowing and what that means for capex spending," said Chuck Carlson, chief executive officer at Horizon Investment Services in Hammond, Ind. "You've got major hyperscalers coming out with results [Wednesday], which probably gives investors even more reason to take a few chips off the table." The S&P/TSX composite closed Tuesday at 33,584.34, down 233.85 points.