Rehypothecation
Rehypothecation
Rehypothecate
Rehypothecation.
Rehypothecation occurs when your broker, to whom you have hypothecated -- or pledged -- securities as collateral for a margin loan, pledges those same securities to a bank or other lender to secure a loan to cover the firm's exposure to potential margin account losses.
When you open a margin account, you typically sign a general account agreement with your broker, in which you authorize your broker to rehypothecate.