This balance appears in the "Amount Due" column of your statement with a minus sign after the amount (i e , $100-) Mayo Clinic may owe a refund to the patient or insurance plan, dependent upon review of the account
The amount of cash left over in either a cash or margin account (or a combined balance of the two) after all securities have been paid for See the explanation of margin for more complete information on using margin leverage in your investing
The surplus in a cash account with a broker after purchases have been paid for, plus the extra cash from the sale of securities