Cash balance in the account. A negative value indicates borrowed funds.
Current total value of owned shares.
Cash plus total market value of all positions.
The difference between your equity and margin requirement is the maintenance excess, and represents the equity available to support new trades. Please note that any open orders reduce maintenance excess.
Buying power is three times your maintenance excess. Buying power represents the maximum amount of stock you could buy based on leverage. For example, if you deposit $1,000 and are buying a stock with a 30% margin requirement, you could buy a maximum of $3,333.33 of this stock ($1,000/.3). Please note that buying power is less if you purchase stocks with higher margin requirement.