What began as a banner day for stocks turned into a major rout, as investors signaled ongoing skepticism about the longevity of the artificial intelligence boom and trimmed hopes of support from the Federal Reserve. The tech-heavy Nasdaq…

Shoppers are still flocking to Walmart. The company raised its full-year earnings and sales outlook Thursday, heading into the crucial holiday shopping season. Walmart also offered fresh signs that it is shedding its original identity as a strictly…