Gloomy economic readings from three continents sent stocks skidding and spurred a bearish recommendation from Goldman Sachs, compounding losses in major benchmarks. The Dow Jones Industrial Average fell 166 points, or 1.3%, to 12658 in afternoon trading on Thursday. The Standard & Poor's 500 fell 21 points, or 1.5%, to 1334. The Nasdaq Composite ticked down 52 points, or 1.8%, to 2878, on course to snap a five-session streak of gains.