AI is still the stock market’s engine. Over the past year, we’ve seen the S&P 500 notch fresh highs as chip deals, larger data-center plans, and novel model launches draw money back into familiar names. It’s like every new headline has tightened the link between AI spending and index performance. However, the wobble following President Trump’s China tariff comments on Friday, Oct. 10, briefly cracked that story. Investors zoomed out and questioned whether the AI-powered rally had gone too far. The Monday ...