Dollar rebounds after slide, oil slumps

By Ryan Vlastelica NEW YORK (Reuters) - The U.S. dollar rebounded on Wednesday from its worst day in more than a year, while a retreat in oil prices pressured energy shares and weighed on Wall Street. U.S. crude futures , which had risen almost 20 percent over the previous four session, fell 7.9 percent. Brent crude fell 5.4 percent to $54.76 per barrel. On Wall Street, the S&P Energy index fell 1.6 percent, the worst-performing group among S&P sectors. "Oil has been the big driver.