Small variety also traded lower in the absence of any buying support.
Medium sugar (M-30) slumped by Rs 69 per quintal to Rs 3,502/3,721 from Wednesday's closing level of Rs 3,571/ 3,721.
Small sugar (S-30) softened to Rs 3,472/3,551 per quintal as against Rs 3,472/3,552 previously.
Sugar spot market was closed yesterday on account of Bhau Bij festival.
The following are today's closing rates for sugar (per quintal) with the previous rates given in brackets:
Medium sugar (M-30) quality: Rs 3,502/3,721 (Rs 3,571/3,721).
Small sugar (S-30) quality: Rs 3,472/3,551 (Rs 3,472/3,552).