is a portfolio which uses only basic asset classes usually a domestic stock total marketindex fund, an international stock total market index fund and a bond total market index fund. It is often recommended for and byBogleheadsattracted by the majesty of simplicity (Boglesphrase), and for those who want finer control and better tax-efficiency than they would get in an all-in-one fund like atarget retirement fund.

There is no magic in the number three; the phrase is shorthand for a style of portfolio construction that emphasizes simplicity, and is related tolazy portfolios.

The LifeStrategy and Target Retirement funds are four-fund portfolios

Diversification. Over 10,000 world-wide securities.

Never under-performs the market (less worry).

Mathematically certain to out-perform most investors.

A three-fund portfolio is based on the fundamental asset classes,stocksandbonds. It is assumed thatcashis not counted within the investment portfolio, so it is not included. On the other hand, it is assumed that every investor should hold bothdomestic and international stocks. The task, then, is to take these three basic non-cash assets domestic stocks, international stocks, and bonds decide how much of each to hold (yourasset allocation); choose where to hold each of these asset classes, and finally choose a mutual fund to use for each asset class.

You must decide for yourself what percentage of stocks to hold

, based in part on your personal risk tolerance. There are no shortcuts and and it needs to be done no matter what investment approach you are using.

Even if you are going to use a single Target Retirement fund, you should not take the shortcut implied by the use of a retirement year in the name; you need to decide for yourself what percentage of your portfolio you want to invest in stocks, and choose the fund that matches it. Even if you are going to use a singleLifeStrategy fund, you need to decide which of them to use, based on the percentage of stocks each one holds.

One traditional rough rule-of-thumb is age in bonds, or percentage of stocks = 100 – age. This is a conservative rule, and leads to smaller percentages of stocks than Vanguard chooses forits Target Retirement series.

The second decision is what percentage of your stock allocation should be U.S. (domestic) and what should be international. This is a much less critical decision because U.S. and international stocks have similar risk profiles and have similar long-term returns. In 2010, Vanguard increased the international allocation of its Target Retirement and LifeStrategy funds from 20% of the stock allocation to 30%, and increased it again to 40% in 2015.

As of 2012, Vanguard provides a tool that recommends a balanced portfolio similar to the kind discussed here (Vanguard recommends afour fund portfolio), with percentages based on your responses to a short online questionnaire. The tool is entitledGet a recommendation to fit your goals; you can navigate to it by way of , Go to personal investors site, What we offer: Mutual Funds, Get a Recommendation.

Since your portfolio may be split between multiple locations (one or more tax-advantaged retirement accounts, and one or more taxable accounts) you should look atPrinciples of tax-efficient fund placementto determine which funds belong in each account. In general, the international fund should go into a taxable account, the bond fund should go into a tax-advantaged account, and the domestic equity fund should fill in the remaining space.

You may need to hold the same (or equivalent) funds in multiple accounts to have ideal asset allocation and asset location.

ForBogleheads, the answer for what mutual funds to use in a three-fund portfolio is low-cost funds that represent entire markets.

If you ask different people to choose funds for a three-fund portfolio, you will get different fund choices. The differences are usually of no fundamental importance, and are usually the result of a) making choices between nearly identical, almost interchangeable funds, and b) simplifying further by using combination package funds. Watch out for high expense ratios, particularly in the bond funds.

From Vanguards list of core funds, the funds that are best for a three-fund portfolio are:

So, a three-fund portfolio might consist of 42% Total Stock Market Index, 18% Total International Stock Index, and 40% Total Bond Market fund.

in fact, consists of these three funds based on the investors desired asset allocation.

One could, of course, useETFsrather than mutual funds. For example, one could use Total Stock Market ETF (VTI)1, Vanguard Total International Stock Index Fund (VXUS)2for international, and Vanguard Total Bond Market ETF (BND).

The building blocks of Boglehead-style investing are low-mutual funds and/orETFs. Vanguard fans would suggest that Vanguard has the best and most complete lineup of such funds, and that the most convenient place to hold Vanguard mutual funds is directly at Vanguard. Thus, the Bogleheads forum and Wiki tends to be Vanguard-oriented. But investing according to theBoglehead philosophycertainly does not require you to invest at Vanguard or use Vanguard products. Here are some suggestions on how to do it with other funds. (Refer to the associated wiki article for additional information.)

With Schwab, investors can construct a three-fund portfolio using:

Schwab U.S. Aggregate Bond Index Fund (SWAGX)

When using Dreyfus index funds, investors can build a three-fund portfolio using:

With Fidelity, for example, you could construct a three-fund portfolio using:

Fidelity ZERO Total Market Index Fund (FZROX) or Fidelity Total Market Index Fund (FSKAX)

Fidelity ZERO International Index Fund (FZILX) or Fidelity Total International Index Fund (FTIHX)

When investing in Northern Funds investors can create a three-fund portfolio using:

T.Rowe Price investors can create a simple indexed three-fund portfolio using the following three funds:

Participants of the Thrift Savings Plan can create a three-fund portfolio using the following three funds, for example:

TIAA annuities plans participants can create a three-fund porfolio with only two funds:

Stock (70% Russell 3000 / 30% MSCI Allworld ex-US)

TIAA mutual fund (retail) participants can use:

When using iShares ETFs, investors can build a three-fund portfolio using:

iShares Core MSCI Total International Stock ETF (IXUS)

iShares Core Total U.S. Bond Market ETF (AGG)

With Schwab, investors can construct a three-fund portfolio using:

When using SPDRs, investors can build a three-fund portfolio using:

SPDR Bloomberg Barclays Aggregate Bond ETF (BNDS)

When investing in Vanguard ETFs, investors can create a three-fund portfolio using:

Vanguard Total International Stock ETF (VXUS)

A total stock market index fund represents the whole market, while an S&P 500 fund does not. Now that total stock market funds exist and have expenses just as low as S&P 500 funds, total stock market funds are preferable. In practice, the importance and magnitude of the difference is a subject of debate. In a 401(k) plan with limited choices one might very well opt for an S&P 500 index fund to serve as the domestic stock component of a three-fund portfolio.

Alternatively, you canapproximate a Total Stock Market fundby combining an S&P 500 index fund with one or more mid-cap and small-cap funds. There arecompletion indexfunds such as Vanguards Extended Market fund (available as an open-end fund as VEXAX and as an ETF as VXF) which can be added to an S&P 500 fund in a specified ratio to produce a hybrid which should perform like a Total Stock Market fund.

Vanguard perplexes investors by offering two virtually interchangeable international stock market index funds: Vanguard Total International Stock Index Fund (VTIAX) and Vanguard FTSE All-World ex-US (VFWAX). SeeShould I buy Total International or FTSE All-World ex-USfor the details.

Be aware of any minimum investment required by each fund; for instance, the Admiral shares of most Vanguard index funds require a minimum investment of $3000.00; If you will have difficulty meeting these minimums, you may want to consider an all-in-one single-fund portfolio until you accumulate enough that this is not an issue.

The Vanguard Total Bond Market Index Fund, and those of several other firms, track the Barclays U.S. Aggregate Index (in Vanguards case, the Barclays U.S. Aggregate Float-Adjusted Index). In Barclays words, this index tracks the investment grade, US dollar-denominated, fixed-rate taxable bond market. The bond market is a somewhat diffuse concept. Some people complain that the Aggregate index isnt really the total bond market. Barclays has a broader index, the Barclays U.S. Universal Index. It includes USD-denominated, taxable bonds that are rated either investment grade or high-yield. As of 2015, 87% of the Universal index is made up of bonds in the Aggregate index, but the other 13% includes U.S. Corporate High Yield Index, Investment Grade 144A Index, Eurodollar Index, U.S. Emerging Markets Index, and the non-ERISA eligible portion of the CMBS Index. People who have strong feelings about wanting to be more total than the Vanguard Total Bond Index Fund might prefer the Barclays Universal index. As of 2015, there is at least one product, the iShares Core Total USD Bond Market ETF, IUSB, that tracks the Barclays Universal index, and with an 0.13% expense ratio, it qualifies as a low-cost index fund. It could be used as the bond component of a three-fund portfolio.

The relative percentage of domestic and international stocks is a subject of intense discussion in the forum. One sensible option is to hold domestic and international stocks in the same proportions as they represent in the total world economy. As of October 2014, that would be about 50% U. S. and 50% international. This option is recommended by Burton Malkiel and Charles Ellis, both of whom have longstanding ties to Vanguard, in their bookThe Elements of Investing. Other authorities suggest holding less than that, and Vanguard currently allocates 40% of stock to international in itsTarget Retirement funds, and in their research, advise holding 20% – 40% international allocations.3. If your own preference is for a total world weighting, then the portfolio can obviously be simplified using Vanguards Total World Stock Index fund, which is exactly what Malkiel and Ellis suggest. Such a two-fund portfolio would use these funds:

The Vanguard Balanced Index Fund holds 60% Total Stock Market Index Fund and 40% Total Bond Market Index Fund. By adding an international stock fund, one could create a three-fund portfolio with two funds.

One Marketwatch article4quotes variousnon-Boglehead commentators as saying such things as You can make it really simple, be well-diversified, and do better than two-thirds of investors and That three-pronged approach is going to beat the vast majority of the individual stock and bond portfolios that most people have at brokerage firms… there is a certain elegance in the simplicity of it.

In her Forbes article,How To Diversify With Just Three Funds, BogleheadLaura F. Dogudescribes this approach and comments With only these three funds (Vanguard Total Stock Market Index fund, Vanguard Total International Stock Market Index fund, and the Vanguard Total Bond Market fund), investors can create a low cost, broadly diversified portfolio that is very easy to manage and rebalance…. Some investors may be uncomfortable with holding only three funds and will question whether they are truly diversified. With these three holdings the answer on diversification is a resounding YES.5

In a 2015 article,The only funds you need in your portfolio now, Walter Updegreave commented: Of course, some advisers will suggest that youre missing out unless you spread your money among all manner of exotic investments (which theyre more than happy to sell you). But the more complicated your portfolio is, the more expensive and more prone to blow-ups its likely to be — which also increases the odds that it will generate subpar returns, and suggested a three-fund diversified portfolio: simply invest in the following three funds (or their ETF equivalents): a total U.S. stock market fund, a total international stock market fund and a total U.S bond market fund.6

Some would argue that a three-fund portfolio is good enough and that there is no real proof that more complicated portfolios are any better. Others would argue that the evidence for superiority ofslice and dicesmall value tilting, and inclusion of classes likeREITsis too strong to ignore.

As of 2016 when this is being written, bond interest rates are near historic lows and there is a good deal of buzz to the effect that the thirty-year bull market in bonds has ended and that investing strategies that have worked for decades should be changed to reflect new realities. Should the three-fund portfolio be modified? No definitive answer can be given to this controversial question, but we can sketch out some of the prevalentand conflictingopinions on the matter.

Some would say that advocates of complex investing strategies

have reasons why simple approaches once worked but dont work any more. Advocates of simplicity might say to ignore the noise and continue to stay the course; it may turn out that something else does better–something always does–but that a three-fund portfolio is still good enough.

In 2013, Vanguard altered the composition of its Target Retirement funds; from 2010 to 2013, most of them were literally three-fund portfolios as described here. Now, the bond portion has been modified to include international bonds; specifically, the bond allocation is now 70% Vanguard Total Bond Market Index Fund and 30% Total International Bond Index Fund. Nothing Vanguard has published would lead one to believe that this is a big change or that it will have a big effect. Some may find it appealing to follow Vanguards lead.

Some well-informed Bogleheads make a strong case that the bond component of a three-fund portfolio might well be filled with non-brokeredbank CDs instead of a traditional bond fund.

Suggestions 2 and 3 are adjustments that dont radically change the risk of the bond component. For the record, it should be stated that Burton Malkiel and Charles Ellis, in the 2013 edition of their book

made a controversial and much more radical suggestion, which shocked many forum members. But, because they were early champions of indexing, each with long associations with Vanguard, their suggestion should be noted. They seemed to be recommending the replacement of a traditional high-grade bond fund with a 50/50 mix of emerging markets bonds and a high-dividend stock fund. Using Vanguards risk potential categories, that means they are recommending replacing a holding in risk potential category 2 with a mix of holdings in categories 3 and 4.

There are single, all-in-one, funds of funds that are intended to be used as an investors whole portfolio. Vanguard funds in this category include the Target Retirement funds, the LifeStrategy funds; perhaps the actively-managed Wellington and Wellesley funds would qualify, too.

On the one hand, a three-fund portfolio involves a do-it-yourself aspect that makes it more complicated than using an all-in-one fund. For example, because different assets grow at different rates, any investor who chooses a do-it-yourself approach needs torebalanceoccasionally perhaps annually in order to maintain the desired percentage mix.

On the other hand, three-fund portfolios are simpler than the genres called Coffeehouse portfolios (William Schultheissterm), couch potato portfolios, orlazy portfolios, which are intended to be easy for do-it-yourselfers but are nevertheless slice-and-dice portfolios using six or more funds.

The Vanguard Target Retirement funds and LifeStrategy funds employ a four fund allocation matrix.note 10The funds include:

Some see advantages in holding a do-it-yourself four-fund portfolio rather than a LifeStrategy fund or Target Retirement fund, even if the same four funds are used. The advantages are small but meaningful to some, and include:

Improved tax efficiency for taxable investors by placing each fund in its best location

Independence from Vanguards small course changes in the Target Retirement funds (as when they increased stock allocation in 2006, and changed domestic-to-international ratio in 2010, and added international bonds in 2013)

Availability of slightly-lower-cost Admiral shares in the individual funds, but not the Target Retirement or LifeStrategy funds

Lazy portfoliosarespecificportfolio suggestions, often involving three funds,with suggested percentages,such as 1/3 Total Stock Market Index, 1/3 Total International Stock Market Index, 1/3 Total Bond Market Index. The term has been popularized by Paul B. Farrell, who writes MarketWatch columns about various simple portfolios. Instead of going through the step of deciding on your own asset allocation, you accept the suggestion that, say, 2/3 stocks to 1/3 bonds and half-and-half domestic and international is a good enough, one-size-fits-all allocation.

A three-fund combination can serve as the core of a more complex portfolio, where you add a smallplay money allocationor atiltto some corner of the market that interests you.

Exactly How To Be A Couch Potato Portfolio Manager

. The original basic, humble, couch potato portfolio consisted of two funds, the Vanguard Index 500 fund, which mimics the Standard and Poors 500 index, and the Vanguard Fixed Income Short Term Government Bond Fund.

Taylor Larimorewas an early advocate of this approach, which he described in 1999 in a Morningstar posting,Which is better, 15 funds or 4?He stated that It is no longer necessary to own large portfolios. Now, with only four funds, it is possible to own all the securities in every asset-class, style, and cap-size, in exact proportion to their market weight. These four funds are: Total Stock Market Fund, Total Bond Market Fund, Total International Fund and a Money-Market Fund.

The Schwab International Index is based on the MSCI EAFE index, which does not include emerging market stocks, Canadian stocks, and which has minimal exposure to international small cap stocks.

Dreyfus Basic shares provide for lower expense ratios and a $10,000 minimum investment. Investors can broaden US stock diversification by adding the Mid Cap (PESPX) and Small Cap (DISJX) index funds to the portfolio allocation. The International Index (tracking the EAFE index) does not include emerging market stocks, Canadian stocks, and has minimal exposure to international small cap stocks.

The Northern Funds three-fund portfolio can be expanded for greater US diversification by adding the Mid Cap Index (NOMIX) and Small Cap Index (NSIDX) to the Stock Index (S&P 500). Investors can also add the Emerging Markets Index (NOEMX) to the International Index (which tracks the EAFE index). This implementation creates a six-fund portfolio. Note that the international indexes being tracked by the funds do not include Canadian stocks nor market weightings of small cap stocks.

The T. Rowe Price International Index Fund is a developed market international index fund. The fund does not include emerging market stocks or Canadian stocks. Small cap international stocks make up only a minimal part of the portfolio. In addition, index purists should take note that the US Bond Enhanced Index Fund utilizes an active management component. The investment manager has the authority to adjust certain holdings versus the benchmark index, which could result in the fund being marginally underweight or overweight in certain sectors, or result in the portfolio having a duration or interest rate exposure that differs slightly from those of the index.

An investor in the Thrift Savings Plan seeking to gain US small cap and mid cap exposure must add the S fund (an S&P completion index fund) to the TSP three-fund portfolio. Also, the I fund (tracking the EAFE index) does not invest in emerging market stocks or Canadian stocks, and has minimal exposure to small cap international stocks.

The Stock fund is comprised of 70% Total US Stock market, 30% total international (excluding US) market, which is 2/3 of a three-fund portfolio.

The Schwab International Index ETF does not include emerging markets nor international small cap stocks. Investors can add exposure to these markets by adding the Schwab Emerging Markets Equity ETF (SCHE) and the Schwab International Small Cap ETF (SCHC) to the portfolio mix.

The SPRR MSCI ACWI ex-US Index provides exposure to 87% of the international stock market. Investors desiring exposure to small cap international stocks can add the SPDR S&P International Small Cap ETF(GWX) and the SPDR S&P Emerging Markets Small Cap ETF (EWX) to the portfolio.

Investors using The Vanguard FTSE All-World ex-US ETF for international stock allocation need to recall that the fund does not provide exposure to small cap international stocks. Investors wanting to include small cap international stocks in the portfolio can add the Vanguard FTSE All-World ex-US Small-Cap ETF (VSS) .

The Vanguard Target Retirement Income fund, and Target funds nearing target dates add a fifth fund, the Vanguard Short Term Inflation Indexed Bond Fund, to the allocation matrix.

Approximating total international stock market

Vanguard funds: life strategy funds vs target retirement funds

SeeVanguard US stock ETFsfor informational resources on VTI (Total Market Index)

SeeVanguard international stock ETFsfor informational resources on VXUS (Total International ETF)

International Equity: Considerations and Recommendations, Vanguard Investment Counseling & Research (01/02/2009)

Jonathan Burton(Dec 5, 2006).Three mutual funds that end the guesswork.Market watch

Laura Dogu(January 28 ,2011).How To Diversify With Just Three Funds.Forbes

Walter Updegreave(December 30, 2014).The only funds you need in your portfolio now.CNN Money

Scott Burns(Oct. 01, 1991).Exactly How To Be A Couch Potato Portfolio Manager.Asset Builder

Interview with Taylor Larimore, author of The Bogleheads Guide to the Three-Fund Portfolio.Financial Page.Feb. 21, 2018

Approximating Vanguard target date fundsLazy portfoliosSlice and diceSlice and dice international

GnuCashHow to build a lazy portfolioInvestment policy statementLump sum vs DCA (Dollar cost averaging)Passively managing individual stocksPrioritizing investmentsRebalancingSystematic investingTax loss harvestingUsing open source software for portfolio analysisUsing a spreadsheet to maintain a portfolioValue averaging

Matching strategySafe withdrawal ratesWithdrawal methods

US stocksNon-US stocksReal EstateBondsMoney marketsAlternate asset classes

Approximating Vanguard target date fundsLazy portfoliosSlice and diceSlice and dice international

GnuCashHow to build a lazy portfolioInvestment policy statementLump sum vs DCA (Dollar cost averaging)Passively managing individual stocksPrioritizing investmentsRebalancingSystematic investingTax loss harvestingUsing open source software for portfolio analysisUsing a spreadsheet to maintain a portfolioValue averaging

Matching strategySafe withdrawal ratesWithdrawal methods

US stocksNon-US stocksReal EstateBondsMoney marketsAlternate asset classes

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