A system and method for securitizing margin loans, wherein a processor system operates to analyze account data for a plurality of accounts, and to identify and flag accounts that are marginable. The process provides for flagging a group of accounts which collectively are representative of a portfolio of marginable accounts held by a brokerage company. The system and method also provides for generating a general ledger for the brokerage company, a SPV, and a trust, wherein these general ledgers track the sale of margin loans belonging to the flagged accounts, from the brokerage company to the trust via the SPV. The system and method further provide for processing transactions in the flagged accounts to identify and classify transactions in the flagged accounts which affect the margin balances for the flagged accounts.