Blurry_Eyed
MS Sig #267, MX Sig # 761
I bought some puts with cash, but since then my account has been margin enabled. I sold the puts and bought slightly more in calls. I have far more than enough in cash to cover the transactions, but TDAmeritrade lists me as having a slight negative margin balance as it seems to have used that rather than my cash to finance the purchase of the calls. It's not a problem I suppose, assuming they're not charging me interest, but I'm curious why it's done that way?
It might be the timing of your trades. If you sold the puts today and bought calls the same day, you technically don't have the cash yet. Options cash becomes available the next trading (Trade +1) day. So TD is fronting you the cash until the Put sale cash arrives in your account tomorrow.
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update -
I checked your post again and I think you said that you had cash in your account, so the above may not be the right theory. Did you have cash in the account that was settled cash before you made the call purchase? If so, then I'm not sure why TD decided to margin you. But if you sold the puts, your cash balance would increase even though the cash had not settled yet. With a margin account, you can utilize cash that will settle the next day or in 3 days (Some investments take 3 days to receive the cash once sold, while others only take 1).
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