Make Pimco Total Return the core of a bond portfolio and complement it with other funds. By Russel Kinnel, Contributing Editor September 3, 2010 Do you own Harbor Bond, Ohio CollegeAdvantage 529 Savings Plan and Schwab Target 2020 Fund? If so, you own Pimco Total Return, in varying degrees, in three different products. If your 401(k) plan is like Morningstar's, it may also offer Pimco Total Return. If you go to a financial planner or broker, he or she might recommend Total Return, too.Total Return everywhere may be a case of too much of a good thing. The fund's insanely large asset base of $239 billion (plus another $236 billion that Pimco runs with the same approach elsewhere) has led manager Bill Gross and his team to increase their use of derivatives to execute their strategy. Clearly, they know what they're doing, and they continue to make savvy big-picture calls -- such as anticipating the housing downturn in 2007 and, recently, shifting into Treasury bonds, which have delivered fine results this year. Given the size of the fund, it makes sense for Gross to rely on top-down forecasts to manage it. Adding a few corporate bonds here and a few foreign issues there just won't have much impact on the fund's performance. How to Build a Bond Portfolio A smart way to invest is to make Total Return (symbol PTTAX) the core of a bond portfolio and complement it with other funds. So, let's talk about Pimco helpers. Begin with Dodge & Cox Income (DODIX), which, like Harbor Bond (HABDX), is a member of the Kiplinger 25. Dodge & Cox's managers conduct excellent research on corporate bonds. But with assets of $22 billion, Income's corporates are likely to pack more punch than similar holdings in Total Return. Co-manager Dana Emery and company have about 40% of Income's assets in corporates, though that figure can go higher if they choose. They've executed their strategy well, as evidenced by the fund's consistent results: Over the past 20 years, it has landed in the top 40% of all intermediate-term bond funds 15 times. That record puts it among the top 10% in 20-year returns. Advertisement With income-tax rates potentially set to rise, tax-free municipal bonds have a lot of appeal (see Great Deals in Muni Bonds). Vanguard and Fidelity are the best fund families in this neighborhood. I'd go with Fidelity Tax-Free Bond (FTABX), Vanguard Long-Term Tax-Exempt (VWLTX) or a single-state muni fund from one of those families if they have one for your state. I'd also want a bolder fund that invests in high-yield and foreign bonds. So I'd add Kiplinger 25 member Loomis Sayles Bond (LSBRX), run by Dan Fuss and Kathleen Gaffney, or a pure junk-bond fund, such as T. Rowe Price High-Yield (PRHYX), whose manager, Mark Vaselkiv, has done an excellent job since 1996. The seasoned hands at both funds don't take imprudent risks. You'll need protection against rising interest rates, so take a look at Fidelity Floating Rate High Income (FFRHX). The fund invests in bank loans that reset at higher yields when rates rise. The fund comes with some credit risk (the possibility that some borrowers will default), but Christine McConnell, who has run the fund since its 2002 launch, has taken a reasonably conservative tack to preserve capital rather than just find the biggest yield. If you're really concerned about inflation, you might also consider a fund that invests in Treasury inflation-protected securities, or TIPS. Pimco runs a good TIPS fund, but I prefer Vanguard Inflation-Protected Securities (VIPSX), a low-cost, direct play on these bonds. The fund is also a member of the Kiplinger 25. Advertisement Finally, make sure that you're not investing your emergency cash in Pimco Total Return and its clones. You should use a money-market fund and maybe a short-term-bond fund for that purpose. Yes, yields are lousy, but you want to have something that is unlikely to suffer big losses when you need your money the most. Because of its ultra-low costs, Vanguard is a good family to look at for both types of funds. Columnist Russel Kinnel is director of mutual fund research for Morningstar and editor of its monthly FundInvestor newsletter.