Say I have $500K in my IB account ( using round numbers, lol ) I sell 10 PUTS (naked) for SPY 150 - I get a total of $50K as premium. ($5K for each PUT) What is the absolute maximum I can further sell without EVER worrying about a margin call ? I'm thinking I have: $500K - $150K(in case I get assigned) + 50K(premium) =$400K so I could sell another 26 PUTs for SPY 150 = $390K to cover them fully ? And I would also get $130K premium for the 26 PUTs ? Are the above calculations correct ? I want NO leverage and am happy to be assigned SPY at $150. Love to hear your seasoned perspectives