U. S. stocks declined as technology shares retreated from a one? year high and energy producers dropped as a stronger dollar dragged down oil, overshadowing the biggest gain in home prices in four years. Technology shares in the S&P 500 fell 0.7 percent after closing yesterday at the highest level since September 2008. The group is still the best? performing industry in 2009, having surged 45 percent. The S&P 500 Energy Index slumped 0.6 percent as the U. S. currency gained. Exxon, the biggest U. S. oil producer, lost 0.8 percent to $69.07.