The benchmark domestic equity indices today extended their positive momentum for the second straight session amid favourable global cues. The 30-share index at the Bombay Stock Exchange, Sensex, gained 610 points, or 0.83 percent, to close at 74,340 and the National Stock Exchange Nifty-50 rose 207 points, or 0.93 percent, to settle at 22,545. The broader market indices at the BSE ended with gains. The Mid-Cap index added over 0.6 percent, while the Small-Cap index advanced over 1.6 percent.