The 30-share index continued its record setting spree for the seventh session with touching a new high of 22,485.77 points in the day trade.
The market was jittery in afternoon session and the index dropped by 90 points to a day's low of 22,295.65 points.
Brokers said RBI's decision to keep interest rates unchanged was largely in line with investor expectations and failed to have any immediate effect.
Reliance Industries rose by 1.25 per cent.
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The wide-based National Stock Exchange index Nifty also set a new record high level by rising 16.85 points, or 0.25 per cent to 6,721.05, after an intra-day record of 6,732.25.
RBI kept key policy rates unchanged since retail inflation still remains "sticky" but introduced steps to increase liquidity and contain volatility in the money market.
A higher opening in Europe supported the trading sentiment in later part of the session, brokers said.
IT stocks, led by Wipro, TCS and Infosys, were the star performers in the current rally. The IT sector index gained the most by rising 1.65 per cent to 8,934.45.
The consumer durable was second best performer by adding 1.33 per cent to 6,612.63.
Axis Bank, HDFC, Dr Reddy's Lab, ONGC, NTPC, Sesa Sterlite and Tata Motors were among major gainers.