Indian equity benchmarks BSE Sensex and NSE Nifty50 are likely to make a gap-down start on Wednesday amid weakness across global markets, as fears of steep hikes in COVID-era interest rates and resilience of the world economy kept investors on the back foot. Singapore Exchange (SGX) Nifty futures — an early indicator of the Nifty index — fell as much as 209 points or 1.2 percent to 17,466 ahead of the opening bell on Dalal Street.