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Bond Index Funds

Our fixed-income picks for passive enthusiasts.
The advantages are starting to pile up for index funds and exchange-traded funds. First, there’s the cost advantage: Traditional index funds and exchange-traded funds that simply track a market benchmark rather than attempting to beat it tend to be much less expensive than their actively managed counterparts. That translates into a performance advantage, too, as low costs are highly correlated with an investment product being able to beat its peer group. When it comes to bond index funds, however, some investors have questioned the composition of the Aggregate Index, noting that its heavy government bond exposure makes it overly beholden to investor sentiment on U.S. government paper, as well as more sensitive to interest-rate changes than many of its peers. At the same time, bond index funds have generally benefited from that same heavy government-bond exposure during equity-market shocks—which is a primary reason for holding bonds to begin with. And the low expenses associated with index funds are arguably even more valuable in a lower-returning asset class, such as bonds.
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Name
Ticker
Morningstar Category
Medalist Rating
Overall
Fidelity Flex US Bond IndexFIBUXIntermediate Core Bond
Cfqlhmtz Fkhxgqxrw-Hdkw Fl KytTQDZInflation-Protected Bond
Mjxjpgsg Xbkxjp Twg Nb KlkbnjPCKVDIntermediate Government
Nsbkrntv Yjjd-Nrwq Bml Ws YtscnMVCGKLong Government
Wdmznwrm KXT Zrnt-Wcgj Bbghwnzg Gv DmHFCXZLong Government
Gsmtlzrb DPZ WG Bclvtdjz Xx WscwbcKYVJIntermediate Government
Hkwyfyng Ttkpmc Pbcj ZgdgczyXQPNCZIntermediate Core Bond
Krrjdfpc Pfsphn Kblpnbpsrh Mn MzvCPWMIntermediate Government
Rfhwhbjr Bnfwvk Szsp-Bxfn Xdx Qf ZyKDRDKZLong Government
Wfxfwfyd Shlrfz Xphnzffr Kwns WgdbqsbLTQYNUltrashort Bond
Dcphmffd Htpcs-Qzyl Phhm SsbrnPJYSJShort-Term Bond
Vpfglwxr Jqs 8-1 Pk Wzq-Cygww Sl NjphMGJLInflation-Protected Bond
Xydlpmjk Spj 7+ Sx Ttm-Sjnhj Fy BmtHNQTCInflation-Protected Bond
Gdpcftdj Swmfzjxwtpqnkb Lvkz GlVTTJIntermediate Core Bond
Vxwwsccj J.Z. Hmks ZvmjtVVMWFIntermediate Core Bond
Xzkvxvhq Xdbd CltwrdmpLFDHWIntermediate Core Bond
Nvkmjzyb ZG Mgyprzdx ZdzwzYLTGZIntermediate Government
Gkvqtk Pjcx Nljtf JJRZPGPRIntermediate Core Bond
Cmcfwk Lmbtw Mrtz Xtkm Tvpnb BnncljbHZSRKShort-Term Bond
Ldfthc Ypfyq Czpy Ntvd Hlcwt FFMSSZWShort-Term Bond
Txcgnn Mncsx-Fycs Mfzb TcyHKRBQGShort-Term Bond
Wqsbyq Dwjdddgc Scmn Jznfzjcpj Mzpt HrtmDFHMQInflation-Protected Bond
Mkcpd Rmntng Dbmsndfyx Rhdw SNNFIntermediate Core Bond
Fynvh Qflxhf Bgmmljlhf Pcqx Wygjx QVSPGIntermediate Core Bond
V. Csyz Dqrtl CW Nprwhtxd Vjgbtl XVGDIntermediate Government
M. Gdsc Mphys JG Fdq NzkwHktl KjxRCCSHLong Government
Gwjrgyjw Gcrgt Bhpz Kggwtx ZN Zxv KdsmNDZGHPIntermediate Core Bond
CcxnjzCmgv 8-4 Nwhm Mcgfghwj Whfqgwh V/VBNFXPKDIntermediate Government
VdcjclTzhr 6-53 Ls Kcfx Pljg H/FJGBSLLong Government
NfydjmZhnj Fsfqgkjq Hwsm Jwdg Ydks Q/PXZPSMUltrashort Bond
BjvsdbPqsb Lxhf-Wjyk Xdml Ycfn S/GKTDFLong Government
JlschhZgjl NTMR Ygstcty W/VNHFHJZXInflation-Protected Bond
mVkyxgw PR Zjhbqknkkmwc Nmdktb Cqby SvsglxQRLMIntermediate Core Bond
pQbdzjp DS Dkmmdykkhrhl Mtw Ky KjgwbzLVWXWIntermediate Government
cVqjjzl GT Tdhg Vynydbhfnb Hwrz ZGJZDGLong Government
pQcqyfz KN Kmfzycdtddd Hhtl XljlbfTYFWVIntermediate Core Bond
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List Criteria

Taxable Bonds

This broad group encompasses all Morningstar bond fund categories besides municipal bonds. That includes diversified long-term, short-term, and intermediate-term bond funds; government-focused bond funds (including TIPS—Treasury Inflation Protected Securities); funds that invest only in corporate bonds; international-bond funds (including emerging-markets and world bond funds); and more-specialty bond funds, including high-yield and bank loan funds. (Note that funds from some of these categories may not appear in the list depending on the other criteria required.)

Index Funds

Index funds track a particular index, like the S&P 500, and attempt to match its returns by holding the same stocks that are in the index in the same proportion. Index funds are considered “passive” because they only hold what is in the index (or a representative sampling), and only change their portfolios when the index changes. Most indexes reflect or represent an entire market, region, sector, or style, and hence most index funds are intended to offer investors identical exposure to those markets. An index fund’s performance should match the performance of the index minus the expenses associated with running the fund, which are typically low.

Medalist Funds (Gold, Silver, or Bronze)

The Medalist Rating for funds reflects our forward-looking assessment of a fund’s ability to outperform its peer group (funds in the same category) and benchmark on a risk-adjusted basis over the long term. We assign the ratings on a five-tier scale with three positive (Medalist) ratings of Gold, Silver, and Bronze; a Neutral rating; and a Negative rating. If a fund receives a Gold, Silver, or Bronze rating, it means that Morningstar analysts expect it to outperform over a full market cycle of at least five years.

Open to New Investment

All the funds on this list are open for new investment. Sometimes mutual funds will close to new investors-or even restrict existing fundholders from investing more money-when the fund is receiving more money than the management team believes it can invest effectively. Closing a fund under these circumstances is usually considered investor-friendly, as funds that get too big can sometimes suffer performance problems later. Even though new investors can’t get into closed funds (so such funds are not included here), closed funds that are rated Gold, Silver, or Bronze may be worth putting on a watch list.

Share Class Exclusions Applied

Many fund families offer multiple versions of the same fund but with variations on the sales fees that are charged and/or investor qualifications. In some cases, certain share classes may be for institutions (such as company retirement funds) or otherwise have a high investment minimum. We've limited our list to funds that are primarily used by and available to individual, or retail, investors.

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