Equity benchmark indices settled on a flat note in a volatile session on Friday as investors booked profits after the Sensex and Nifty touched fresh lifetime highs in intra-day deals. The BSE Sensex was down 7.65 points or 0.01 per cent to settle at 75,410.39. The NSE Nifty fell 10.60 points or 0.05 per cent to close at 22,957.10. Sector-wise it was a mixed bag with buying seen in Oil & Gas, Banking, and Financials.