: This is the critical figure that forms the basis for your buying power; it is the sum of your cash and the market value of your marginable securities.
In Interactive Brokers (IBKR), refers to the maximum dollar amount of securities you can purchase specifically for intraday trades—positions that must be closed before the market closes. Core Definitions and Calculations
: In a cash account, your buying power is simply your settled cash . Key Rules and Restrictions Equity with Loan Value - IBKR Campus