Equity benchmarks nursed mild losses on Monday after choppy trade as investors pared positions in blue-chips amid a largely subdued trend in global markets. Sensex snapped a two-session rally and ended at 123.53 points or 0.23 per cent lower at 52,852.27. NSE Nifty slipped 31.60 points or 0.20 per cent to 15,824.45.