Indian equity indices ended lower on August 18 with Nifty below 24,200 amid selling seen in the IT, realty, metal and FMCG names. At close, the Sensex was down 492.70 points or 0.63 percent at 77,235.46, and the Nifty was down 132.75 points or 0.55 percent at 24,154.90. About 1860 shares advanced, 2258 shares declined, and 172 shares unchanged.