When you're a long-term investor saving and investing for retirement, it's hard to beat the simplicity and power of a low-fee, broad-market index fund such as one that tracks the S 500. It aims to deliver returns that roughly match the index -- which has an average annual growth rate of close to 10% over many decades.

The S 500 offers dividend income, too. As of this writing, it yielded around 1.4%. dividend income is valuable for retirees and near-retirees (and many others) because it tends to arrive regularly, no matter what the economy is doing, and that income can be reinvested in more stock or withdrawn to help support you in retirement. Better still, dividends from healthy and growing companies tend to be increased over time. You can do better than the S 500's 1.4% dividend yield, though, if you park some money in one or more dividend-focused exchange-traded funds (ETFs).

Here are four well-regarded ETFs to consider.

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Source Fool.com