Warren Buffett ETF Portfolio (90/10) Review & M1 Finance Pie

Financially reviewed by Patrick Flood, CFA.

Contrary to popular belief, the Warren Buffett ETF Portfolio is actually a fairly high-risk portfolio. Here we’ll check out its components, historical performance, and the best ETF’s to use for it.

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What Is the Warren Buffett ETF Portfolio?

Hopefully Warren Buffett needs no introduction. He is arguably the most successful investor in history, among other things, consistently outperforming the market historically. Don’t let this fool you, though. Buffett is the first to admit that retail investors should keep it simple and invest in an S&P 500 index fund.

Warren Buffett himself has never actually written any books. But if you’re interested in his style of investing, he has stated that his favorite book is The Intelligent Investor by Benjamin Graham, an excellent introductory resource on Value investing. The recent revised edition contains some great commentary by the legendary Jason Zweig. You can also find the famous collection of Warren Buffett’s letters to shareholders over 30+ years here.

The Warren Buffett ETF Portfolio became famous when, in a 2013 letter to Berkshire Hathaway shareholders, Buffett indicated that upon his passing, the trustee of his estate will invest 90% of his wife’s inheritance in a low-cost index fund and 10% in short-term government bonds.

Note that Buffett admits that this specific allocation may not be suitable for everyone. More risk-averse investors will (and should) prefer a lower allocation to equities. Young investors almost certainly shouldn’t be holding short bonds; more on this later.

Interestingly, recent research from Javier Estrada, professor of finance at the IESE Business School in Barcelona, Spain, suggests that Buffett’s prescribed 90/10 asset allocation may actually not be as risky as it appears at first glance, at least in terms of survivability in retirement. Estrada looked at 86 different 30-year intervals between 1900 and 2014, and found that at a typical 4% withdrawal rate in retirement, Buffett’s 90/10 portfolio had an extremely low failure rate of only 2.3%, only slightly worse than the traditional “conservative” 60/40 stocks/bonds portfolio.

The Warren Buffett Portfolio asset allocation is as follows:

• 90% US Large Cap Blend
• 10% Short-Term Treasury Bonds

History has shown that indexing the S&P 500 is a solid investment, but I’d definitely prefer to see some allocation to international stocks, as they offer a diversification benefit since they don’t move in perfect lockstep with U.S. stocks. Similarly, there’s no sensible reason to completely avoid small- and mid-cap stocks that would be included in a total market index fund. Quite the opposite actually; we know that risk factor diversification (small stocks, Value stocks, etc.) conveniently lowers portfolio risk. However, this portfolio bears Buffett’s name because it fits his investing style of focusing on U.S. large caps historically. Specifically, Buffett amassed his fortune by identifying underpriced and/or downtrodden large U.S. companies with strong profitability, so he was basically a factor investor before factor investing was a thing, which explains his market outperformance.

In regards to the bonds, 10% in short treasuries simply doesn’t make much sense. 90/10 using short bonds still has 99% of the portfolio’s risk being contributed by the stocks side. That is, 90/10 using short bonds is not materially different – in terms of volatility and risk – from a 100% stocks portfolio. I think in Buffett’s eyes, this 10% is less of a stocks hedge and more of simply a parking garage for cash. Keep in mind this is just the portfolio that Buffett’s estate is supposed to be invested in, the value of which can easily sustain huge drawdowns and still cover his wife’s living expenses, so its riskiness is sort of irrelevant for its intended purpose. Retail investors can’t say the same. It’s almost certain that using long bonds for that 10% would produce superior results (in terms of both general and risk-adjusted returns) for the portfolio as a whole over the long term. Similarly, short bonds would not be appropriate for a young investor with a long time horizon.

Warren Buffett ETF Portfolio Performance Backtest

Going back to 1977, here’s a comparison of the Warren Buffett ETF Portfolio and the S&P 500 through 2019:

As we’d expect, the results have been very close, with the Warren Buffett achieving a slightly higher risk-adjusted return (Sharpe) due to the small diversification benefit of the inclusion of short-term treasuries.

Warren Buffett Portfolio ETF Pie for M1 Finance

M1 Finance is a great choice of broker to implement the Warren Buffett ETF Portfolio because it makes regular rebalancing seamless and easy with one click, has zero transaction fees, and incorporates dynamic rebalancing for new deposits. I wrote a comprehensive review of M1 Finance here.

Using entirely low-cost Vanguard funds, we can construct the Warren Buffett Portfolio pie with the following ETFs:

• VOO – 90%
• VGSH – 10%

You can add the Warren Buffett Portfolio pie to your portfolio on M1 Finance by clicking this link and then clicking “Invest in this pie.” Investors outside the U.S. can use eToro.

M1 Finance is actually currently running a promotion offering a $30 bonus for a taxable account funded with $1,000+ within 2 weeks of opening. Details are here.

They also have a transfer bonus promotion for up to $2,500 when transferring an existing account from another brokerage, as outlined below:

Sign Up for M1 Finance

Disclosure: I am long VOO in my own portfolio.

Interested in more Lazy Portfolios? See the full list here.

Disclaimer:  While I love diving into investing-related data and playing around with backtests, I am in no way a certified expert. I have no formal financial education. I am not a financial advisor, portfolio manager, or accountant. This is not financial advice, investing advice, or tax advice. The information on this website is for informational and recreational purposes only. Investment products discussed (ETFs, mutual funds, etc.) are for illustrative purposes only. It is not a recommendation to buy, sell, or otherwise transact in any of the products mentioned. Do your own due diligence. Past performance does not guarantee future returns. Read my lengthier disclaimer here.