Bull or bear market? AI spurs rethink of traditional market measures

Bull or bear market? AI spurs rethink of traditional market measures  Reuters

Sept 2 : Everyone knows Wall Street calls a 20 per cent drop in a major index a bear market. But what do you call it when the index posts big gains and losses practically every day and is still way up for the year?That question is testing the limits of the market's most familiar vocabulary and prompting some to questio