The latest figures from Fidelity Investments are out, showing how much its account-holders have on average in their 401(k) balances. With the Dow Jones Industrials (DJINDICES:^DJI) and the S&P 500 (SNPINDEX:^GSPC) having soared last year, did retirement investors do as well?

In the following video, Dan Caplinger, The Motley Fool's director of investment planning, looks at the results of how 401(k) investors did in 2013. Fidelity says that average account balances rose 15.5% to $89,300, with about three-quarters of the gain coming from rising markets and the remainder from contributions. Dan notes that those age 55 or older nearing retirement have an even bigger average of $165,200. But he points out that those balances aren't enough to make ends meet without other income sources, such as Social Security. Dan concludes that you should be sure to do everything you can to save for retirement both within and outside your 401(k).

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Dan Caplinger and The Motley Fool have no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.