What is the difference between Securities Margin and Commodities Margin?

CHECK YOUR CASH AVAILABLE FOR WITHDRAWAL

To ensure a Reg T margin account remains margin compliant a cash withdrawal request is limited to the lesser amount of either the current Available Funds or the amount of (Reg T Equity less Reg T Margin). In addition,…

When you open a margin account you have the ability to borrow from IBKR. You can not set a limit or a set only a specific amount of margin to use in a margin account. If the account has sufficient Available Funds then a new order would be accepted. There is a calculated margin requirement for positions in a margin type account displayed as an Initial margin and Maintenance margin requirement. In addition to contracts traded in the account any borrowed cash from Forex trading or from trading outside the account’s Base Currency can have a calculated margin requirement. There are tools available so you can monitor your account’s margin requirements and cash balances in real time or as a daily snapshot…

As the assets in an IRA account are not eligible to be pledged as loan collateral, and stock ordinarily serves as the collateral securing payment of a margin loan, account holders are not permitted to buy stock on margin in either a Cash or Margin type IRA account. All stock purchases must be paid for in full with cash.  In addition, other transactions which require a margin account such as shorting stock and selling uncovered options are not allowed in either a Cash or Margin type IRA account…

Unfortunately, this is not possible. The system will allow you to withdraw the amount of available currency you hold in the case of cash accounts. If you have a margin account, the system will allow you to withdraw funds up to the available margin amount. …