Online real-estate platform Zillow Group Inc ZG.Ojumped after beating Wall Street estimates for quarterly sales, boosted by an 11-fold revenue increase in its homes segment. 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.