Indiabulls Housing Finance Company and Delta Corp are the two stocks under trade ban on May 23. The availability of banned stocks for trading in the cash market remains the same. An open interest of over 95% of the market-wide position limit places a stock in the ban period, which continues until open interest falls below 80%. Traders who trade in indices do not face a security ban. Nifty gained momentum to close above 18,350 levels, and its lower-end support stands at 18,200 levels.