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Indian equity benchmarks Sensex and Nifty50 are likely to make a gap-down opening on Wednesday amid weakness across global markets. At 8:40 am, Nifty futures trading on Singapore Exchange -- an early indicator of NSE's Nifty50 index in India -- were down 131.5 points or 0.7 percent at 17,948.5.

Equities in other Asian markets fell tracking overnight losses in the US, with MSCI's broadest index of Asia Pacific shares outside Japan down 0.2 percent in early deals. Japan's Nikkei 225 index was down 0.3 percent.

China's Shanghai Composite and South Korea's KOSPI were down 0.8 percent each, Hong Kong's Hang Seng down 0.3 percent and Singapore's Straits Times down 0.6 percent.