Canada’s main stock index drove further into record territory Tuesday, while U.S. markets were mixed, with AI stocks recovering some of their losses from earlier in the day. The S&P 500 index was up 15.60 points at 7,428.78, while the Nasdaq composite was down 55.17 points at 24,876.91. The losses for AI chip stocks were even sharper earlier in the day in other markets worldwide. It’s a rotation that some strategists have suggested could be healthy for the overall stock market. Technology stocks were leading the gains on the TSX, helped by shares of Celestica Inc. rising 9.5% after it reported second-quarter results after markets closed Monday.