But movements under the surface tell a clearer story of market winners and losers. Tech is the worst-performing sector in the S&P 500 so far this year, down about 4%. There, concerns that AI will disrupt the software industry have offset big stock gains for the makers of memory chips and data storage devices. Key Takeaways It might be hard for investors to feel upbeat while the major indexes are being hammered by tumbling tech stocks. But that's exactly how some experts are reacting to the rout. "I actually ...