Apparatus and method for trade aggregation of trade allocations and settlements

1. A post-trade aggregation system for financial instrument trading systems, wherein a trader manages a plurality of trade orders to be executed by one or more executing brokers on behalf of customers via a data interface system, said plurality of trade orders including at least one wrap block order and at least one institutional block order, the plurality of trade orders being merged into a single merged block order, apportioned into a plurality of smaller electronic trade orders, and transmitted to a plurality of order destinations, said post-trade aggregation system comprising:

one or more computer systems in electronic communication with said data interface system and with a clearing system, said one or more computer systems being configured to compress individual executions from the plurality of order destinations corresponding to the plurality of smaller electronic trade orders into a single net marked-up step-out for wrap orders and a single average-priced block for institutional orders;

said system further configured to:

merge wrap orders and institutional conflict trade orders into a single block order in an order management system, each trade order identifying a number of shares of a security to be traded;

divide the single block order into a plurality of electronic trade orders;

transmit the plurality of electronic trade orders to a plurality of trade destinations;

aggregate executions corresponding to the plurality of electronic trade orders;

split data from an aggregated execution data for institutional shares and wrap shares into separate aggregated blocks;

add or subtract blended commission rate from an average aggregated price for the wrap allocations to create a new, net average price aggregated block; set step out allocations for the executions corresponding to the wrap orders; and transmit wrap block and step out allocations to a clearing facility.

2. The post-trade aggregation system according to claim 1 , wherein: the clearing facility prints each new net wrap block trade to tape; and step-out net wrap allocations are transmitted to each wrap sponsor at a printed price with no commission rate.