Apple Inc AAPL.O, Amazon.com Inc AMZN.O, Nvidia Corp NVDA.O and Microsoft MSFT.O all fell, and weighed more than any others on the S&P 500's .SPX decline. By Bansari Mayur Kamdar and Noel Randewich Feb 11 (Reuters) - Wall Street stocks ended sharply lower on Friday for the second straight session, as investors fretted about deepening tensions between Russia and Ukraine. With investors already fretting about inflation and rising interest rates, selling on Wall Street accelerated after Washington warned that Russia had massed enough troops near Ukraine to launch a major invasion, and that an attack could begin any day.