📝 Executive Summary
Canada Pension Plan Investment Board CEO John Graham warns that artificial-intelligence-driven stock valuations are becoming dangerously stretched, even as equity benchmarks continue to smash all-time highs. His caution echoes growing concerns about a potential replay of the dot-com era, with AI mania fueling unsustainable price gains. The comments weigh on technology shares and broader market sentiment, though no immediate sell-off materialized.