Season 7 Episode 4: Cersei invades Highgarden, coming into possession of much gold and with it she pays off the kingdom’s debts to the Iron Bank of Bravos. The Iron Bank had become fond of the interest payments the kingdom’s debts were building up and by paying off the debt the interest payments ended. This is an example of a callable bond, which allows the issuer – the crown – to return the principal to the bank and stop interest payments before the bond reaches maturity.
