The BSE benchmark Sensex on Saturday closed nearly 19 points lower on profit-selling by funds in a 90-minute special trading session.
The 30-share Sensex settled at 15,848.80 points, down by 18.93 points from its previous closing.
Similarly, the 50-share National Stock Exchange index Nifty shed 7.20 points to close at 4,746.90.
The National Stock Exchange conducted the special session for upgrading its futures and options trading infrastructure to improve the processing capability and better handle increased activities.
To maintain uniformity in trading timetable, the BSE also conducted the special trading session.
The special session commenced at 1115 hrs on a sluggish note and ended at 1245 hrs with a moderate loss.