Wall Street shares closed lower on Monday with the benchmark stock index Standard & Poor's 500 recording the largest three-day fall since February as investors sell-off internet shares with Amazon losing 1.6% and Yahoo! Inc slipping 3.5%. The S&P 500 Index slid 1.08% to 1,845.04, the Dow Jones industrial average tumbled 1.02% and the Nasdaq Composite Index inched 1.16% lower.