A
system and a method for making payments at a
point of sale (POS) is disclosed, involving a computing device with a digital wallet application, a management
server administering a
client payment account, and a trusted entity
server administering a
client brokerage account. The method associates the
client brokerage and
payment accounts with a client and facilitates transactions initiated via a POS
payment system. Upon receiving a transaction
authorization request, the management
server establishes a secure connection with the trusted entity server to retrieve brokerage account data. The server analyzes available securities in the brokerage account and currency balances in the payment account to generate financing suggestions for the transaction, including partial security sales and
partial payment from the payment account. The client selects a financing suggestion via the digital wallet application, and the management server instructs the trusted entity server to execute the suggested security sale. The transaction is authorized at the POS using the payment account, and proceeds from the security sale are recovered and applied to the payment account. The disclosed method enables integrated, secure, and flexible financing for point-of-sale transactions.