distinguished fellow

Banks Using Leverage to Force Home Equity Repayments

Your article isn't sufficiently clear as to whom it is that makes / pays the reimbursement (nor why it is called a reimbursement, which makes it sound like some government payment to banks) mentioned in:
"When HELOC securitizations reach a certain delinquency level, banks are no longer reimbursed for HELOC advances to borrowers."
Dr.LKR.