Hi I have been trading with IB for some time and I find them very good. My account reads as (approximate figures) : Initial Margin Requirements(IMR): 53,000 Maintenance Margin Requirement(MMR): 44,000 Stock Market Value(SMV): 43,700 Cash Balance(CB): 45,000 Equity with Loan Value(ELV): 88,700 Option Market Value(OML): -20,000 Net Liquidating Value(NLV): 68,700 I sell Puts some OTM and some ITM. I would appreciate if some could tell me: The margin amount available to me so I can sell some more Puts. Is it : (ELV - IMR )* 2 which should be greater than IMR (88.7 - 53) * 2 = 71.4 - 53 = 18.4 So 18.4 is still available to me. Can some please throw some light on this. And how will the new 4:1 change the above. Will I have much more available as margin. Thanks in advance.