EVERY WEEK, a brand new excessive. Little surprise a way of unease is settling over markets. Some 40% of worldwide fund managers assume that artificial-intelligence (AI) shares—an important driver of the rally—are already in a bubble, in accordance with Financial institution of America’s newest month-to-month survey. Even Wall Road’s most starry-eyed pundits reckon America’s S&P 500 index of main shares can eke out solely minor beneficial properties within the remaining 9 months of the 12 months. For some, such nervousness portends a crash. However for everybody, it prompts a query: with inventory costs having already risen a lot, are there any left that supply good worth?