Systems and methods for dynamic implementation of exchange traded funds. In one embodiment, a method for dynamic implementation of exchange traded funds may include: (1) receiving a start of day value for a holding comprising a plurality of funds; (2) calculating a current value for the holding by applying a plurality of conducted trades after the start of day value involving at least one fund in the holding; (3) applying a plurality of open orders to at least one of the funds in the holding; (4) determining a per unit fund basket based on the current value; (5) optimizing the per unit fund basket; (6) compliance checking the per unit fund basket; (7) adjusting the per unit fund basket by using tax lot information to harvest a highest tax lot and a lowest tax lot; and (8) rebalancing the per-unit basket to match a next day index.