Securities in one Interactive Brokers (IBKR) account cannot be used as collateral for linked accounts. Each IBKR account is treated as a separate entity and stands on its own, even if multiple accounts are linked under the same username. This means that:
- Positions in one account cannot be used to meet the margin requirements in a different account.
- The collateral value of securities is limited to the specific account in which they are held.
- Linking accounts does not allow for cross-account collateralization.
This policy ensures that each account maintains its individual risk profile and adheres to its specific margin requirements. It is important for IBKR clients to manage each account's collateral and margin requirements independently, regardless of any account linkages they may have established.
If you need additional collateral for a particular account, you would need to transfer funds or securities directly into that account rather than relying on assets held in other linked accounts.