A computer system for administering investment funds holding shares of funds includes a processor and a memory storage device in communication with the processor. The processor is adapted to access from the memory storage device data indicative of allocation targets for allocating invested funds among two or more funds in two or more investment categories; receive data indicative of current holdings of shares, subscriptions and redemptions, and including security values, prices and fund value data; calculate the current allocations among investment categories and determine any differences between the current allocations and the allocation targets; allocate cash from the subscriptions to funds having allocations below their target allocations, commencing with a fund ranked at a greatest level below its target allocation; and allocate the cash to be withdrawn via redemptions to funds having allocations above their target allocations, commencing with a fund ranked at a greatest level above its target allocation.