The gauge opened on a subdued note, but in noon trade, it staged a strong comeback to hit the day's high of 27,872.23, led by gains in IT, consumer durables and realty stocks.
Soon, profit-booking emerged at higher levels that ate into the gains and took the benchmark back to the negative territory, which closed down 41.77 points, or 0.15 per cent, at 27,645.53. The index had gained 481.24 points in the past two sessions.
In the previous two sessions, the markets rose on the back of forecast of a timely monsoon, coupled with the government reporting fiscal deficit at 4 per cent of the GDP for 2014-15. Continued hopes of a rate cut by RBI on or before the policy meet early next month had helped too.
Of the 30-pack Sensex, 17 ended with losses and 12 finished higher. ITC ended flat at Rs 332.10.
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A higher closing at other Asian markets and a better opening in Europe following yesterday's record closing on the US markets influenced sentiment, they added.
The losers which contributed to the fall include HDFC, Tata Motors, ONGC, Bajaj Auto, Hind Unilever and Axis Bank.
Bucking the trend, Hero MotoCorp, Wipro, Vedanta, Infosys, Tata Steel and Tata Power ended higher, thus cushioning the impact.
Sector-wise, the BSE Auto index suffered the most by losing 0.77 per cent, followed by oil & gas (0.45 per cent), PSU (0.40 per cent), FMCG (0.22 per cent), banking (0.17 per cent) and power (0.04 per cent).