Fractional shares order execution methods

A method for executing a notional-based buy order through a first communication unit of a first participant, comprising:

• receiving, by a processing unit including at least one processor communicatively coupled to a non-transitory processor-readable medium storing processor-executable code, a first estimated fractional share component of a notional-based buy order having a first amount, where the first estimated fractional share component is comprised of a calculated quantity, wherein the notional-based buy order is received from a first communication unit of a first participant;
• providing, by the processing unit, the first estimated fractional share component to a first queue, wherein the first queue is configured to process fractional share components on a first-in-first-out basis;
• recalculating, by the processing unit, the calculated quantity of the estimated fractional share component when the first estimated fractional share component has reached the top of the first queue, wherein a quantity of the estimated fractional share component is recalculated as a function of the first amount and a real-time price;
• providing, by the processing unit, a second estimated fractional share component, comprised of the recalculated quantity, to a second queue after a trade of an estimated whole share component of the notional-based buy order is executed, wherein the execution of the whole share component is reported through a second communications unit of a second participant;
• determining, by a balancer, whether a sufficient quantity of fractional shares is stored in a fractional shares database;
• executing, by the balancer, if a sufficient quantity is stored, a buy of fractional shares from the fractional shares database, wherein the buy of the fractional shares is executed by a fracker balancer based on a user imposed parameter, wherein the fracker balancer is configured with the user imposed parameter and the user imposed parameter includes controls to adjust and set inventory risk exposure, and wherein the user imposed parameter is determined to be elected to hold no more than one share of a given security in the fractional share database and to hold no more than what is necessary to execute current orders;
• determining, by the balancer, a second dollar amount for the second estimated fractional share component;
• adjusting, by the balancer, the second estimated fractional share component as a function of the first amount, wherein the adjusting is performed by the fracker balancer using an adjustment factor when the second dollar amount is greater than a dollar amount of the notional-based buy order;
• generating, by the balancer, a report upon the completion of the first transaction or the second transaction;
• and
• transmitting the generated report to the first participant.