Over the past 25 years, defined contribution (DC) plans--including 401(k) plans--have become the most prevalent form of employer-sponsored retirement plan in the United States. The majority of assets held in these plans are invested in stocks and stock mutual funds, and the decline in the major stock market indices in 2008 greatly reduced the value of many families' retirement savings. The effect of stock market volatility on families' retirement savings is just one issue of concern to Congress with respect to defined contribution retirement plans. This report describes seven major policy issues with respect to defined contribution plans: 1. Access to employer-sponsored retirement plans. In 2007, only 61% of employees in the private sector were offered a retirement plan of any kind at work. Fifty-five percent were offered a DC plan. Only 45% of workers at establishments with fewer than 100 employees were offered a retirement plan of any kind in 2007. Forty-two percent were offered a defined contribution plan. 2. Participation in employer-sponsored plans. Between 20% and 25% of workers whose employer offers a DC plan do not participate. Workers under age 35 are less likely than older workers to participate. 3. Contribution rates. On average, participants in DC ...