U.S. stocks slip on earnings; US dollar index at 7-month high

By Hilary Russ NEW YORK (Reuters) - U.S. stocks slipped on disappointing earnings reports on Tuesday, while U.K shares rose helped by mining firms, and crude oil prices fell as the U.S. dollar hit a seven month high. Nine of the eleven sectors in the benchmark U.S. S&P 500 stock index were negative, after poor earnings forecasts from some of the largest companies. General Motors Co shares fell more than 4.7 percent, despite better-than-expected third-quarter earnings, amid fears a slowdown i