lifecycle fund
n.—Gloss: An investment arrangement in which money is invested in safer securities and investments as a person grows older. «The funds, also known as lifecycle funds, are designed to minimize risk by shifting the funds’ assets from equities to bonds as investors grow older.» —“Senate Weighing New Rules for Retirement Funds” by Ylan Q. Mui Washington Post Feb. 21, 2009. (source: Double-Tongued Dictionary)