In a bull market that's more than 10 years old, it's only reasonable to be thinking hard about risk controls. And the best way to diversify equity risk is to make sure you have asset classes in your portfolio that will hold their ground, or possibly even gain a bit, when stocks fall.
Our most recent run of asset-class correlations data suggests that you probably don't need to venture into arcane, expensive alternatives to build a diversified portfolio. Plain-vanilla, high-quality bonds have been among the best diversifiers for equities over the past decade, eclipsing every other asset class on that front.
Christine Benz does not own shares in any of the securities mentioned above. Find out about Morningstar's editorial policies.