Indian equity benchmarks BSE Sensex and NSE Nifty50 are likely to open lower on Monday, despite mixed moves in other Asian markets and a rise in US futures. Singapore Exchange (SGX) Nifty futures — an early indicator of the Nifty index — fell as much as 123.5 points or 0.7 percent to 16,465.5 early on Monday, suggesting a lower start ahead on Dalal Street.