Indian equity benchmarks BSE Sensex and NSE Nifty50 are likely to open lower on Thursday, tracking weakness across global markets amid concerns that latest economic data might do nothing to push the Fed off track from its aggressive interest rate hiking cycle. Singapore Exchange (SGX) Nifty futures — an early indicator of the Nifty index — declined as much as 82.5 points or 0.5 percent to 16,425.5 ahead of the opening bell.