The Sensex was trading at 26,081 points, 0.34% down while the Nifty was down 34 points at 7,920 post noon, the fall being led by banking and IT stocks.
Trading had begun on a positive note on Wednesday, with the Sensex gaining 26 points and the Nifty up 10 points, with metal and pharma stocks leading the modest rally.
The buoyant November car and two-wheeler sales registered by auto companies did not trigger a spurt in these stocks.
Maruti Suzuki was marginally up by 0.88% but the rest of the auto stocks were witnessing lacklustre trading on the bourses.
SBI, Infosys and ICIC Bank were trading lower, while Axis Bank and Wipro were slightly in the green.
