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Six years ago, AAII founder James Cloonan introduced the Level3 Passive Portfolio. While the portfolio continues to be an alternative to simply tracking the S&P 500 index, it does not match the allocation needs of all individual investors. We are therefore transitioning our focus to demonstrating how the broader AAII Asset Allocation Models can be personalized to help you meet your unique goals.
The Level3 Passive Portfolio as an Alternative to the S&P 500
The need for a simple, basic long-term approach for those who do not want to be active investors prompted AAII founder James Cloonan to develop the Level3 Passive Portfolio while writing his book “Investing at Level3.”
The Level3 Passive Portfolio was intended to be a simple approach for investors who do not want to be active investors. As noted by Cloonan, it was not expected to be among the best-performing portfolios, particularly over shorter one- to five-year horizons. However, it was expected to outperform the average investor who simply follows market-capitalization-weighted indexes such as the S&P 500 over the long term. The Level3 Passive Portfolio is an index approach that takes advantage of some of the factors that have historically led to better long-term returns.
We started tracking the actual portfolio on May 31, 2016, as shown in Figure 1. The Level3 Passive Portfolio has underperformed the S&P 500 as measured by the SPDR S&P 500 ETF
(SPY) since its inception. The actual Level3 Passive Portfolio has a compound annual total return of 8.9% since May 31, 2016, compared to a return of 12.2% for the SPDR S&P 500 ETF over the same period.
As noted in the performance table in Figure 1, the Level3 Passive Portfolio is composed of four exchange-traded funds (ETFs). The Level3 Passive Portfolio is titled toward value and smaller firms relative to the S&P 500. These are segments that have underperformed the S&P 500 until recently. The Level3 Passive Portfolio also has a 10% exposure to the real estate sector. Real estate shined in 2021 but has otherwise underperformed the S&P 500 over the seven years that the portfolio has been in existence.
Figure 1. Level3 Passive Portfolio Performance Through 6/30/2022

Two of the holdings in the Level3 portfolio employ equal-weight approaches: Invesco S&P 500 Equal Weight ETF
(RSP) and Invesco Russell 1000 Equal Weight ETF
(EQAL). In contrast, the S&P 500 is market-cap weighted. In a market-cap-weighted index, the proportional weight of each company in the index is determined according to the total market value of its outstanding shares. With a market-cap-weighted index, popular stocks can become overweighted, leaving the less popular and potentially underpriced stocks underweighted.
In contrast, equal-weighted indexes are tilted toward smaller companies. With regular rebalancing, they tend to sell the latest winners and invest in stocks that have underperformed recently. The performance of equally weighted indexes more closely reflects the performance of the average company, not just the largest firms.
The Level3 Passive Portfolio also holds the Vanguard Mid-Cap Value ETF
(VOE). Historically, mid-cap value stocks have had higher returns than large-cap stocks or mid-cap growth stocks.
The fourth holding in the Level3 portfolio is the Vanguard Real Estate ETF
(VNQ), which has a 10% portfolio weight. It was included to provide some diversification while taking advantage of the strong historical returns of real estate investment trusts (REITs).
While the holdings of the Level3 Passive Portfolio continue to be attractive, there is considerable overlap within the equity segments, the portfolio lacks exposure to the smallest segment of domestic companies and it is without any direct exposure to foreign firms. While Cloonan was a strong advocate of small and micro-cap stocks, he preferred active management for this asset class and the direct control of managing a portfolio of small-cap stocks (as evidenced by AAII’s Model Shadow Stock Portfolio, which Cloonan started in 1993 and managed until his retirement).
With foreign companies, Cloonan preferred active instead of passive management, especially for funds that target specific investment areas such as emerging or frontier markets. It was for these reasons that small-cap and foreign segments were not included in a portfolio that was focused on passive index ETFs.
AAII Asset Allocation Models
Many AAII members wish to only hold funds and look to our Asset Allocation Models for guidance on reasonable asset allocations that take into account their time horizon and ability to withstand short-term market volatility.
The AAII Asset Allocation Models have long provided such guidelines (Figure 2). The models incorporate three key building blocks to a successful allocation strategy: stocks, bonds and cash. Allocation may be the most important decision an investor makes. The mix of assets held—and the percentage of the portfolio allocated to each asset class and categories within each asset class—primarily determines the returns you will realize. One study put the influence that allocation has on portfolio returns at 90%.
Figure 2. Breakdown of the Three Asset Allocation Models

Source: www.aaii.com/asset-allocation.
Aggressive Allocation Model
The aggressive allocation uses a 90% stock weighting. It should realize the highest level of return but will also incur the greatest level of volatility. The key to the model is to maintain a heavy allocation to stocks. Investors intending to use it should have both a high level of risk tolerance and a lengthy investment time horizon.
Moderate Allocation Model
The moderate allocation uses a 60% stock weighting and a 40% bond weighting. This model is based on the traditional 60/40 allocation but provides more diversification on both the stock and bond sides. It is intended to provide long-term growth with more income, less volatility and lower returns than the aggressive allocation model.
Conservative Allocation Model
The conservative allocation uses a 40% stock weighting and a 60% bond weighting. It places a greater emphasis on preservation of capital and reduction of portfolio volatility. A sizable weighting to stocks is still included to provide growth in excess of the rate of inflation. The expected rate of return is lower than either the aggressive or moderate models.
Expanding on the Models
Going forward, we will focus on using the allocation models as relatively neutral starting points for portfolio construction and focus on identifying funds and ETFs that capture factor, style and portfolio objective tilts.
Following the AAII Asset Allocation Models
Individual investors can easily implement the AAII Asset Allocation Models by using mutual funds, ETFs or a combination of the two.
We use seven Vanguard mutual funds to track the allocation models (see the box below). Index funds were purposely selected to minimize expenses and limit the influence of decisions made by active managers. The Vanguard funds chosen are widely available and have generally low investment minimums.
Sample Mutual Funds and ETFs for Implementing the Asset Allocation Models
As of December 2020, the following mutual funds used to track the models are:
-
Large-cap stocks: Vanguard 500 Index Admiral Shares
(VFIAX) -
Mid-cap stocks: Vanguard Mid-Cap Index Admiral Shares
(VIMAX) -
Small-cap stocks: Vanguard Small Cap Index Admiral Shares
(VSMAX) -
International stocks: Vanguard Developed Markets Index Admiral Shares
(VTMGX) -
Emerging market stocks: Vanguard Emerging Markets Stock Index Admiral Shares
(VEMAX) -
Intermediate-term bonds: Vanguard Intermediate-Term Treasury Investor Class
(VSIGX) -
Short-term bonds: Vanguard Short-Term Treasury Admiral Shares
(VFISX)
Other mutual funds that can be used for implementing the allocation models can be found in AAII’s mutual fund guide.
Exchange-traded funds (ETFs) that can serve as proxies for the allocation models include, but are not limited to:
-
Large-cap stocks: Vanguard S&P 500 ETF
(VOO) -
Mid-cap stocks: Vanguard Mid-Cap ETF
(VO) -
Small-cap stocks: Vanguard Small Cap Index ETF
(VB) -
International stocks: Vanguard Developed Markets ETF
(VEA) -
Emerging market stocks: Vanguard Emerging Markets ETF
(VWO) -
Intermediate-term bonds: Vanguard Intermediate-Term Treasury ETF
(VGIT) -
Short-term bonds: Vanguard Short-Term Treasury ETF
(VGSH)
Other ETFs that can be used for implementing the allocation models can be found in AAII’s ETF guide.
Source: www.aaii.com/asset-allocation.
An alternative to mutual funds is ETFs. We’ve listed the corresponding ETFs in the box as well. In most, but not all, cases the listed Vanguard ETFs are just different share classes of the same fund. This is a trait that is unique to Vanguard.
Just because we use Vanguard funds to track the models doesn’t mean you are limited to them; there are other options. For example, instead of holding the Vanguard S&P 500 ETF
(VOO), the iShares Core S&P 500 ETF
(IVV) or the Invesco S&P 500 Equal Weight ETF could be used. Mutual fund investors can consider the Fidelity 500 Index fund
(FXAIX) or T. Rowe Price Equity Index 500 fund
(PREIX), among others, as alternates.
In the small-cap arena, the choices are vaster. The average market cap of stocks held by the Vanguard Small Cap Index Admiral fund
(VSMAX), which tracks the CRSP U.S. Small Cap index, is $5.3 billion. The Schwab Small-Cap Index fund
(SWSSX), which tracks the Russell 2000 index, has an average market cap of $2.4 billion. The iShares Core S&P Small-Cap ETF
(IJR), which tracks the S&P SmallCap 600 index, has an average market cap of $1.9 billion.
Which funds you choose will depend in part on the type of account you are using and your preference for active or passive management. Investors using brokerage accounts have broad access to the universe of exchange-traded funds. (ETFs are commonly offered on a commission-free basis.) Many no-load mutual funds are offered on a transaction-free basis, though the exact funds included on these lists vary by broker.
If you are using a workplace retirement plan such as a 401(k), 403(b) or 457(b) plan, your options will be more limited. The same applies to 529 plan accounts as well as many health savings accounts (HSAs). In such instances, you will need to select funds that best match the desired asset class categories you wish to have exposure to.
In all cases, we suggest paying attention to costs. High expense ratios, loads, fees and transaction costs will reduce the return you will realize. Most index funds have low tax-cost ratios, but you should still check if you’re holding a mutual fund or ETF in a taxable account.
Volume and size matter for ETFs. As a general rule, the ETFs offered by BlackRock (iShares), State Street (SPDR) and Vanguard that track well-known indexes have more than adequate size and trading volume. When looking at an ETF tracking an unfamiliar index and/or offered by a smaller ETF provider, seek a minimum asset size of at least $100 million. Also, ensure that the tracking error—the difference between the net asset return and the price return—is very small. Tracking error is shown on AAII’s ETF Evaluator page (look for the rows labeled (NAV +/- Price Return).
Adding in Factor, Style and Objective Preferences
Broad-based index funds work well for a wide variety of investors. But not every investor wants to track the performance of the major indexes for each asset class category. You may prefer to have greater exposure to value or seek a higher level of income, for instance.
All allocation models can be followed in a manner that tilts the portfolio toward certain factors, styles or objectives. You simply use different mutual funds or ETFs to fill the various components of each model.
Tilting With Factors
Factors are characteristics associated with higher long-term risk-adjusted returns. Two of the oldest and most established factors are value and size.
The value factor calls for buying stocks trading at below-median valuations. Value-oriented mutual funds and ETFs can be found in the large-, mid- and small-cap domestic asset class categories. (There are not many small-cap value ETFs; just nine were in existence of as June 30, 2022.)
Internationally, exposure to foreign large value stocks from companies domiciled in developed markets can be attained by using either mutual funds or ETFs. There are only a handful of emerging market value mutual funds. A value investor could consider combining the developed and emerging market allocation weightings in such cases. The Vanguard International Value fund
(VTRIX), for instance, has a 21% allocation to emerging market stocks.
Regarding size, the asset allocation models already tilt toward this factor with the inclusion of mid- and small-cap weightings.
You could enhance your exposure to the size factor by following the Level3 Passive Portfolio’s approach and use equal-weighted ETFs for the large- and mid-cap allocations. There would be some overlap between the Invesco S&P 500 Equal Weight ETF and the Invesco Russell 1000 Equal Weight ETF, so keep that in mind. Then, you may wish to hold a mutual fund or ETF with a lower average market cap than, say, the Vanguard Small Cap Index mutual fund and ETF.
On the international side, there are both mutual funds and ETFs that target foreign small-cap stocks. For emerging markets, you would need to focus on mutual funds.
Adjusting for Growth or Income Preferences
Growth is not a factor, but it is a popular investing style. Getting exposure to growth is similar to value. Instead of holding, say, the Vanguard Value Index fund
(VVIAX), you would hold, say, the Vanguard Growth Index fund
(VWUSX). On the ETF side, you might favor the iShares Russell 1000 Growth ETF
(IWF) instead of the iShares Russell 1000 Value ETF
(IWD).
Again, there are fewer choices among foreign mutual funds and ETFs, but there are options.
Applying a preference for portfolio income without altering your overall stock/bond allocation requires seeking out dividend-focused mutual funds and ETFs. Unfortunately, Morningstar does not have a separate “income” or “dividend” category. (AAII uses Morningstar’s mutual fund and ETF classifications.)
Dividend-oriented funds tend to be classified in the value category. The SPDR S&P Dividend ETF
(SDY), for instance, is a large value ETF. Invesco International Dividend Achievers
(PID) is a foreign large value ETF.
There is only a small number of small-cap dividend mutual funds and ETFs. The WisdomTree US SmallCap Dividend ETF
(DES) is one. Proportionately fewer small-cap stocks pay dividends than large-cap stocks.
On the fixed-income side, higher yields can be achieved by targeting funds with longer durations (meaning greater interest rate sensitivity) and/or issuers with weaker credit ratings than their peers. The category risk index—which can be found in our mutual fund and ETF guides, evaluator pages and in our A+ Investor screeners—can be used to help identify funds that are taking on more risk than their category peers. High-yield bond funds can also be used.
Keep in mind that bonds are included in the asset allocation models to reduce the overall volatility of the portfolio. When you take greater risk on the bond side, you increase the overall volatility of the portfolio’s returns. Furthermore, credit risk in bonds is largely asymmetric. There is limited upside to a bond’s price when its credit rating is upgraded. The potential downside for any bond is a complete loss of capital should the issuer go bankrupt. (Investment-grade bonds rarely default. Default rates rise significantly at the lower rungs of the credit ratings scale.)
Looking Ahead
In future articles, we will go into more detail about how AAII members, like you, can implement the asset allocation models into real-world portfolios. We’ll compare and contrast both mutual funds and ETFs for the various asset allocation categories. We will also go into more detail about the options for personalizing the models with options for investors favoring value, smaller size, growth or income.
In doing so, we’ll also provide helpful suggestions for differentiating among mutual funds and ETFs to help you choose the right fund for your needs.
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