Interest rates simply can't go much lower -- and eventually must rise. Here's what to do. By Steven Goldberg, Contributing Columnist February 11, 2013 Ever since 1981, bond yields have been falling, and bond prices, which move in the opposite direction of yields, have been rising. The result has been one of the greatest bull markets ever. Eventually, the bull market in bonds will come to an end. When? Who knows? But you need to prepare for its demise now.See Also: Our Interest Rate Outlook I don't mean to be flippant. The fact is, though, that I and many other investing professionals and economists have been warning of the risk of rising rates for years. Not only have they not reversed course for any meaningful amount of time or extent, for most of the past few years bond yields have continued to fall. But remember, former Federal Reserve Chairman Alan Greenspan warned of "irrational exuberance" in tech stocks in 1996 — more than three years before they imploded. Bubbles tend to take much longer to pop than you expect. But when they do inevitably burst, the losses are often much worse and more widespread than most investors anticipate. So it was with tech stocks and real estate. And, I believe, so it will be with bonds. Here are five steps to take to protect yourself from the inevitable bear market in bonds. The first four involve one superb fund, Metropolitan West Unconstrained (symbol MWCRX). But you can use other funds in addition to or instead of the Metropolitan West offering. Even though Unconstrained is relatively new, I chose it because its managers have chalked up a terrific track record running Metropolitan West Total Return (MWTRX), a somewhat similar but more conservative fund, since 1997. I also picked it because I agree with all of the managers' major themes. Advertisement 1. Avoid funds with much interest-rate sensitivity. "Rates are at historic lows," says Unconstrained co-manager Stephen Kane. "We think they'll go higher over time." I couldn't agree more. Consequently, the fund is positioned so that if interest rates rise by one percentage point, the fund's price should drop by just 1%. Plus you'll still collect the fund's 2.9% yield. To achieve its low interest-rate sensitivity, Unconstrained is currently selling Treasury bonds short — that is, betting that they will decline in price. Should rates continue to drop, though, the fund won't necessarily lose money because it owns other bonds that will benefit from falling yields. 2. Buy high-yielding "junk" bonds. These are bonds issued by companies that stand a real chance of not being able to meet their obligations to pay interest and principal. Unconstrained has just 5.5% of its assets in junk bonds — a relatively small helping of carefully selected bonds. Why so little? Junk bonds are richly priced — driven up by yield-hungry investors. The average price of a junk bond today is about $1,050, or 5% more than it will fetch at maturity. What's more, many junk issuers are allowed to "call" — that is, redeem — bonds anytime at $1,050 per bond. Junk bonds, on average, yield about 6%. All these negatives combine to make junk the weakest of my bond recommendations. But given the tendency of junk bonds to strengthen in tandem with the economy, I'd still buy some here. 3. Buy private mortgage-backed securities. Yup, these are some of the very same securities that blew up during the 2008 financial meltdown. Their prices plummeted, as we all know. But they have since recovered much of their value. After all, a homeowner who has been paying regularly on a mortgage for five years isn't nearly as likely to default as a new buyer. Plus, the housing market is gathering steam. Kane says mortgages are "at the top of our list." They yield 6%-7%; plus, he thinks they'll gain in price. All told, he expects low double-digit returns from the 21% of the fund in private mortgages. 4. Buy emerging-markets bonds. Emerging nations are, by and large, growing much faster than developed economies. Plus, most of their fiscal houses are in far better shape than the U.S., Europe and Japan. That makes their bonds and their currencies attractive to me. But emerging-markets sovereign debt — that is, debt underwritten by governments — is hardly undiscovered. Kane says yields on many of these bonds are no higher than yields on U.S. investment-grade corporate bonds. Instead, Kane and his co-managers favor foreign-government bonds denominated in local currencies, which can appreciate, and bonds issued by corporations based in emerging markets. Advertisement Don't expect to get rich in this fund. The easy money has been made in bonds. Kane says 6% or 7% is a "realistic return" for the coming 12 months. And he may be overly optimistic. 5. Prepare to sell investment-grade funds. Unconstrained shouldn't be your only bond fund. You probably still own an investment-grade corporate bond fund or municipal bond fund — or one of each. My plan is to exit such funds when the yield on the ten-year Treasury climbs to 3.5%. As of February 11, ten-year Treasuries yielded 1.96%, so you'll have lost some money if you wait that long. But my hunch is that you'll lose more if you stay invested. There's nothing special about my mental stop-loss number; you may pick a better one. But I do think you need an exit strategy. After all, cash may yield nothing — but a zero return is better than a loss. Steven T. Goldberg is an investment adviser in the Washington, D.C. area.