The stock market's Monday slide has Wall Street asking whether Santa Claus will call this year, after all. What began as a slide in stocks linked to artificial intelligence and precious metals has evolved into a broader market decline. Only 164 stocks in the S&P 500 were trading higher on the day. The S&P 500 was down 0.6%. The Dow was down 308 points, or 0.6%. The Nasdaq Composite was down 0.8%. ...