Sensex drops 297 points to end below 27,450; Infosys slumps 6%: Benchmark share indices ended over 1% lower on Friday with Infosys leading the decline after disappointing March quarter earnings while the guidance for the current fiscal was also lower than Nasscom estimates. Meanwhile, according to reports the Central Board of Direct Taxes has instructed Foreign Portfolio Investors claiming treaty benefits be settled within a month. The 30-share Sensex ended down 297 points at 27,438 and the 50-share Nifty closed 93 points lower at 8,305. The broad market depicted weakness. There were more than two losers against every gainer on BSE.