Abstract: Method and system for management of an investment fund over a specified life, or time horizon Ht, for that fund. Generally, the system includes an investment fund Fn having a fixed time horizon Ht and an associated length to horizon LH. The fund Fn includes several investment assets Ak, which may be contained within investment portfolios Pm, which meet some criteria defining a predetermined asset characteristics. Cash is directed to selected ones of the assets, or portfolios, to establish an investment mix for the investment fund Fn. An important aspect of the method and system is adjustment of the investment mix in accordance with some criteria related to the time horizon Ht, preferably related to the diminishing length to horizon LH, of the investment fund Fn. Thus, as the investment fund matures, the investment mix is changed.