Are Millennials prepared for retirement? In a few decades, 19- to 36-year-olds will start hitting their 50s and economists say the prospect of weaker investment returns is high. This means much of Millennials' retirement prep will come in the form of savings.

In a recent Charles Schwab survey, Millennials said retirement plans are among their top concerns, and most are prioritizing retirement above paying off student loans, credit card debt and even job security.

But young adults aren’t doing much to resolve the problem, Bloomberg reports. Data from T. Rowe Retirement Plan Services reveals it’s a struggle just to get Millennials to sign up for 401(k)-style retirement plans—which has resulted in companies automatically signing workers up. T. Rowe says 84% of Millennials go along with being auto-enrolled in 401(k) plans. Most experts recommend employees allocate 10% to 15% of their pay to retirement, and most Millennials are only managing half of that. [Bloomberg]