Benchmark index Sensex opened in green on Diwali and is currently up around 550 points, while Nifty jumped around 160 points. Reliance, Bajaj Finserv, Axis Bank, Kotak Bank, Infosys are among the major gainers. "The momentum in the market, triggered by sustained huge DII buying, marginal FII buying, is set to continue with more positive news," an expert said.