Indian equity benchmarks BSE Sensex and NSE Nifty50 are likely to open lower on Monday tracking weakness across global markets, as concerns persisted about steep hikes in pandemic-era interest rates as central banks scramble to tackle decades-high levels of inflation. Singapore Exchange (SGX) Nifty futures — an early indicator of the Nifty index — fell as much as 48.5 points or 0.3 percent to 15,267 ahead of the opening on Dalal Street.