Concerned about an AI bubble? Sign up for The Daily Upside for smart and actionable market news, built for investors. Sometimes, markets can be a harsher judge than the fashion police. Levi Strauss & Co. reported top- and bottom-line figures Wednesday that beat Wall Street's second-quarter forecasts, hiked its earnings guidance and increased its dividend. Shares in the jeansmaker nonetheless fell 5% in after-hours trading. With demand for denim steady, why did investors react like it's cheap rayon?