The Future & Options contracts of any stock enter a ban period when its open interest (OI) exceeds 95% of the market-wide position limits (MWPL). The ban is lifted only when the open interest falls below 80% of MWPL The Future & Options contracts of any stock enter a ban period when its open interest (OI) exceeds 95% of the market-wide position limits (MWPL). The ban is lifted only when the open interest falls below 80% of MWPL Economic Times