Indian equity benchmarks BSE Sensex and NSE Nifty50 are likely to start Thursday's session sharply lower amid a global sell-off as concerns resurfaced about rising inflation and its impact on world economic growth. At 7:36 am, Singapore Exchange (SGX) Nifty futures -- an early indicator of the Nifty index -- were down 323.5 points or two percent at 15,912. Investors awaited the last led of corporate earnings from India Inc for cues.