After a higher start at 34,877.71, the 30-share BSE barometer advanced to 34,936.03 in morning trade on continued buying by investors driven by encouraging quarterly earnings.
However, across-the-board profit booking at record levels it down to a low of 34,735.55.
The Sensex had gained 410.44 points in the previous three sessions. It had closed at an all-time high of 34,843.51 on Monday.
It shuttled between 10,762.35 and 10,687.85 during the session.
On Monday, it had closed at a life-time high of 10,741.55.
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