Patent ID: 7461027

Claim:
A computer-implemented method of administering an actively managed investment company that invests assets in fixed income securities, the method comprising: (a) recording issuance of one or more classes of shares that are listed for trading on a securities exchange and that are bought and sold in a secondary market at negotiated market prices in an investment company processor; (b) selecting and holding in a first computer database a portfolio of fixed income securities that relate to a benchmark index, wherein the selection is made by the investment company in an actively managed manner such that the duration range of the securities holdings is either: (i) longer than the duration of the benchmark index, (ii) close to the duration of the benchmark index, or (iii) shorter than the duration of the benchmark index; (c) responsive to the selecting and holding in a first computer database a portfolio of fixed income securities that relate to a benchmark index, the investment company defining a creation unit basket that has a duration that is equal to a midpoint of the duration range of the securities holdings of the investment company in the first computer database; (d) storing in a second computer database the creation unit basket; and (e) using a publication module that is in communication with the second computer database to periodically publish the creation unit basket stored in the second computer database to facilitate creation and redemption of shares in the one or more classes of shares in step (a).