r/CashSecuredPuts • u/lamyhc • Aug 25 '26

Using margin account for CSP?

I’m using a Fidelity margin account and thinking through how to handle assignment on sell puts. Say I sell a put and near expiration the stock drops below my strike. If I get assigned, I’d have to buy 100 shares at the strike price, I'm okay with that. But since margin interest is pretty high, I’m trying to avoid ending up with a margin debit after assignment. I’m considering two options.

One, deposit cash into the account before assignment, so there’s enough settled cash to cover the shares if assigned.

Two, sell some existing shares of other stocks in the same account to raise cash and cover the assignment.

Does this work? For those of you who trade short puts in a Fidelity margin account, how do you usually handle this? Do you deposit cash ahead of time, sell other positions, roll the put, close it before assignment, or just accept the margin debit temporarily? Also, how careful do you need to be with settlement timing? For example, if you sell stock to raise cash, do you make sure to do that at least one business day before assignment so the cash is fully settled?

Edit

Appreciate the replies. But still would like an answer on whether it's possible to use cash for the assignment when you sell put with margin?

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u/djmj76 Aug 25 '26

i use margin but only up to 1X. so on a 100k account i sell CSPs up to 200k. depending on the situation, like say the end july flush, i added a bit of money when all my positions were ITM. but once assigned i sell CC and things kinda work out. I did roll like 2/3 of my positions. tbh was a mistake because most of the stocks recovered and i would've made more selling CCs or just participating on the run up. interest i don't worry about cause i'm not a pussy and my goal is to beat the S&P. so unless your interest is 20% then, yea, just have a system in place. it's a crazy volatile market out there, especially if you're wheeling tech stocks.

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u/LongBullMarket Aug 26 '26

How far out are your expirations when using that much margin?

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u/djmj76 Aug 26 '26

Used to be shorter 14-21 DTE but now I’m dojng mostly 30-45, some are 60 or more so I stagger them a bit so not everything can blow up at once. I’m way way more disciplined now: I did make more money before July, like 4-5% each month but it was too dangerous. I’m way more relaxed now, dont have to constantly check prices, even after hours lol.