Tracking the Asian cues, the benchmark index zoomed over 377 points in early trade on the Bombay Stock Exchange on Wednesday on heavy buying by foreign funds in blue chip stocks.
The 30-share index, Sensex shot up by 377.15 point at 17,705.77 points in first five minute of dealings.
Similarly, the wide-base National Stock Exchange index, Nifty, spurted by 109.55 point at 5178.50 point.
Trading sentiment gathered momentum following reports of major Asian stock market's indices setting new records.
The major buying activity was notice in power and refinery stocks such as NTPC, Reliance Industries and ONGC.