1. A computer implemented method of administering a tax-managed, buy-write investment fund having a plurality of units available for sale to the public, the method comprising: (a) Identifying, electrically, an index representing a first portfolio of assets having desired performance characteristics; (b) Configuring, electrically, a second portfolio of assets; (c) Configuring, electrically, the second portfolio to have less than 70 percent overlap with the first portfolio; (d) Purchasing shares of the second portfolio; and (e) Writing index call options against the first portfolio; wherein the identifying (a), configuring (b), configuring (c), purchasing (d) and writing (e) are performed using a computer.