Indian equity benchmarks BSE Sensex and NSE Nifty50 are likely to make a gap-up start on Friday, building on one-month closing highs in the previous session, amid gains across global markets after the Fed hinted at a more tempered program of hikes in COVID-era interest rates.Singapore Exchange (SGX) Nifty futures — an early  indicator of the Nifty index — rose as much as 147 points or 0.9 percent to 16,280, suggesting a sharply positive opening ahead on Dalal Street.