Equity benchmark indices ended flat on Monday as investors booked profits in index heavyweights amid high valuation concerns. The BSE Sensex gained 17.39 points or 0.02 per cent to settle at 73,895.54. The NSE Nifty declined 33.15 points or 0.15 per cent to close at 22,442.70. Sector-wise it was mixed with buying seen in Realty, IT & FMCG. PSUs especially Banking & NBFC were under pressure after RBI proposed stricter lending rules.