MarketWatch.com | Top Stories Follow Why optical stocks Lumentum and Coherent were the day’s biggest S&P 500 gainers Investors are looking further down the AI data-center supply chain for signs of demand amid concerns of a spending slowdown, one expert says. https://www.marketwatch.com/story/why-optical-stocks-lumentum-and-coherent-were-the-days-biggest-gainers-051af440?mod=mw_rss_topstories marketwatch.com