(Bloomberg) -- US stocks are hovering near record highs, unfazed by the war with Iran, stubborn inflation and mounting questions over how Wall Street will finance the expanding AI buildout. But for investors looking for a scare this Halloween, some of the market’s most unsettling signals are hiding just beneath the surface. From violent swings in semiconductor shares and ballooning AI-related debt, to a stock-bond hedge that’s lost some of its reliability, as well as a widening wealth divide, the charts occupying Wall Street’s attention paint a less comforting picture than the major indexes might suggest.