The 30-share index resumed higher at 22,116.23 and firmed up further to an all-time high of 22,204.94 before quoting at 22,179.22 at 1000 hours.
It showed a rise of 83.92 points, or 0.38 percent, from its last close.
Shares of realty, power, auto and refinery sectors were the major gainers.
Foreign institutional investors (FIIs) continued their buying spree by investing net Rs 1,004.52 crore on Wednesday, as per provisional data from the stock exchanges.
The NSE 50-share Nifty also rallied to an all-time high of 6,638.80 before quoting at 6,626.60 at 1000 hours, showing a gain of 25.20 points, or 0.38 percent, from its last close.
Major gainers were - SBI (1.57 percent), RIL (1.13 percent), Sun Pharma (0.99 percent), Gail India (0.78 percent), Hindalco Ind (0.72 percent), M&M (0.72 percent), Bharti Airtel (0.69 percent) and Tata Motors (0.67 percent).
However, ONGC dropped by 1.60 percent, TCS (0.87 percent) and Coal India (0.57 percent). Asian markets were mostly lower in their morning trade amid concerns that US President Barack Obama might step up pressure on Russia.
Key benchmark indices in Taiwan, Hong Kong, China and Japan fell by 0.02-1.14 percent while indices in Indonesia, Singapore and South Korea rose by 0.14-0.45 percent.
US stocks finished lower on Wednesday after mid-afternoon selling intensified when President Obama, in a speech in Brussels, called for further economic sanctions against Russia over its annexation of Crimea.


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