Indiabulls Housing Finance has been placed under the futures and options (F&O) ban, but will still be available for trading in the cash market. The ban on a stock occurs when the open interest (OI) crosses 95% of the market-wide positions limits (MWPL) and is only lifted when the OI falls below 80%. Traders who deal with indices are not affected by security bans. Indiabulls Housing's MWPL stood at 97.2% on Friday, with OI at 59.5 million, up by 9.9% from the previous session.