While Warren Buffett has endorsed a value style of investing for decades, the other thing he frequently advocates for is simplicity. He’s not a frequent trader or chasing the next hot thing, and he doesn’t make exotic bets. He simply invests in durable, long-lasting businesses and lets them do their thing.
This same concept applies to retail investors. By building a portfolio around large, financially healthy companies, you can set yourself up for years of long-term wealth creation. In a 2013 letter to Berkshire Hathaway shareholders, Buffett said the following:
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Put 10% of the cash in short-term government bonds and 90% in a very low-cost S&P 500 index fund. (I suggest Vanguard’s.) I believe the trust’s long-term results from this policy will be superior to those attained by most investors.
Buffett couldn’t be much clearer than that. He believes investors should have the Vanguard S&P 500 ETF (NYSEMKT: VOO) in their portfolios.
Key takeaways
VOO tracks the S&P 500, charges just 0.03% annually, and has grown to more than $950 billion in assets, making it one of the largest investment funds in the world.
Q1 2026 S&P 500 earnings are on pace to grow by roughly 28% year over year, the best result since 2021.
Buffett designed a 90/10 framework so non-expert investors could achieve results that outperform most professional managers without the cost or complexity.
Why Buffett’s investing principles still apply
Many investors are overweight tech and growth stocks right now, whether that’s via an ETF targeting one of those themes or just through an S&P 500 ETF. The index’s 33% tech allocation is substantially higher than it was just a decade ago, when it accounted for about 20% of assets.
But over time, the S&P 500’s sector allocation adjusts to where the economy is moving. At different points over the past few decades, tech, energy, and financials were the biggest individual sector holdings. Investing in the S&P 500 doesn’t require market timing or frequent trading. Its simplicity is its biggest selling point. It’s truly a long-term buy-and-hold index that allows investors to capture the U.S. economic growth engine.
Buffett acknowledges that most people shouldn’t be trying to pick individual winners. Even most professional money managers fail to do it on a consistent basis. By simply investing in the index via the Vanguard S&P 500 ETF, you get long-term growth potential with rock-bottom fees.