A stable value fund is a type of investment available in 401(k) plans and other defined contribution plans as well as some 529 or tuition assistance plans. Stable value funds are often made available in these plans under a name that intends to describe the nature of the fund (such as capital preservation fund, fixed-interest fund, capital accumulation fund, principal protection fund, guaranteed fund, preservation fund, or income fund among others). They offer principal preservation, predictable returns, and a rate higher than similar options without proportionately increasing risk. The funds are structured in various ways, but in general they are composed of high quality, diversified fixed income portfolios that are protected against interest rate volatility by contracts from banks and insurance companies. For example, a stable value fund may hold highly rated government or corporate debt, asset-backed securities, residential and commercial mortgage-backed securities, and cash equivalents. Stable value funds are designed to preserve principal while providing steady, positive returns, and are considered one of the lowest risk investment options offered in 401(k) plans. Stable value funds have recently been returning an annualized average of 2.72% as of October 2014, higher than the 0.08% offered by money-market funds, and are offered in 165,000 retirement plans.