Method and apparatus for managing financial transactions for multiple counterparties that allows traders, market makers, dealers, and prime brokers to negotiate with multiple liquidity providers simultaneously, and to receive and respond to transaction processing directives and settlement instructions in real time. The invention, which may be accessed over an interconnected data communications network, such as the Internet, using a standard Web browser, as well as via a proprietary user interface, automatically provides customers, traders, executing banks, funding banks, prime brokers and liquidity providers with up-to-date settlement and allocation details for previously-executed financial transactions as they are received.