The Globe and Mail reports in its Thursday edition that U.S. stocks ended lower on Wednesday, with losses in Advanced Micro Devices, Palantir and other tech companies, as investors worried about pricey valuations and whether Wall Street has reached Peak AI. A Reuters dispatch to The Globe says the Toronto Stock Exchange, however, ended higher, finding strength in rallying oil prices. Advanced Micro Devices tumbled 17 per cent after the chipmaker forecast quarterly revenue that disappointed investors and suggested it is having a tough time competing against Nvidia. Nvidia dropped 3.4 per cent and the PHLX semiconductor index fell 4.4 per cent. Palantir slumped almost 12 per cent. Some software companies added to recent losses amid worries that rapidly advancing AI could disrupt industry incumbents. Snowflake fell 4.6 per cent and Datadog lost 3.3 per cent. The S&P/TSX Composite Index ended up 0.6 per cent, extending its rebound from a four-week low on Friday. Shares of Thomson Reuters rose 2 per cent, clawing back some of the previous day's steep decline. Energy was up 1.4 per cent as the price of oil settled 3.05 per cent higher on concern that planned talks between the U.S. and Iran due on Friday could collapse.