Indiabulls Housing Finance Company, Indian Energy Exchange (IEX) and The India Cements are under the F&O ban for trading from June 12. The ban applies when the open interest on any stock reaches 95% of the market-wide position limits, and is lifted when it falls below 80%. While Indiabulls has been under the ban since June 6, IEX is the latest stock to enter the list, and India Cements re-entered after a two-session break. All three stocks will be available for trading in the cash market.