Systems and methods of conducting financial transactions are disclosed. For example, one disclosed method includes receiving a first price on a computer from a provider, the first price associated with an available volume of a financial instrument; associating the price with the provider in a computerized database of a plurality of providers; identifying a plurality of user-preferred providers in the computerized database associated with the first price; aggregating the available volume of the financial instrument offered for sale or required for purchase by the plurality of user-preferred providers on the computer; and causing the aggregated volume of the financial instrument to be displayed on a display in communication with the computer.