Indian equity benchmarks Sensex and Nifty opened higher on Thursday, lifted by Reliance Industries and financial stocks, extending a five-day rally on optimism around a potential Goods and Services Tax (GST) cut, while investors awaited the Federal Reserve’s annual symposium for clues on the path of interest rates.The S&P BSE Sensex rose 152.65 points, or 0.19%, to 82,010.49 at the open, while the NSE Nifty 50 gained 36.20 points, or 0.14%, to start above the 25,000 mark at 25,086.75.