Eagle, this from Fidelity,
last sentence.......
(((Short credit and short debit balances are calculated using the "previous day's" closing price.))))
Apparently Scottrade is looking at it as a zero closing price, it is probably one of their policies on a halted stock.
I Agree it does bite as it ties up the use of the cash for how long is anyone's guess. I do not know ameritrades policy on that sitiuation.
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Short Credit/Debit Balance (Prior Day's Close)
If your account owes money, it has a short debit. For example, if a shorted stock goes up in price, you may need to add money to meet the minimum short requirement.
If your account is in the money, it has a short credit. For example, if a shorted stock goes down in price, the short credit balance shows by what amount your balance exceeds the minimum short requirement. You can use this amount for other purposes (e.g., you can withdraw it as cash).
(((Short credit and short debit balances are calculated using the previous day's closing price.))))