Shares of Amazon (NASDAQ: AMZN) stock gained 14% in May, according to data provided by S&P Global Market Intelligence. It's building on the momentum of a public craze about the possibilities of artificial intelligence (AI), as management announced its own generative AI efforts back in March and then debuted several new AI-powered devices in May. Amazon had been losing some steam over the past year as sales growth decelerated in the aftermath of astronomical pandemic growth, and profitability has been pressured as demand slows.