Buffett’s S&P 500 Guidance: Lower ETF Costs, Heightened Concentration Risk
2 August 2026

Buffett’s S&P 500 Guidance: Lower ETF Costs, Heightened Concentration Risk

NEW YORK, August 2, 2026, 11:58 a.m. EDT

  • The lowest-cost unleveraged S&P 500 ETF in the U.S. has an annual fee of 0.02%.
  • The leading three stocks in the index accounted for 20.29% as of July 30.
  • Consensus for Friday’s employment report is an increase of 83,000 jobs.

Warren Buffett followers can access S&P 500 exposure at a 0.02% yearly fee. On July 30, though, three stocks comprised 20.29% of the index. That weighting represents the main portfolio decision.

Stock chart for INDEXSP:.INX

Three articles over the weekend portray Vanguard S&P 500 ETF as Warren Buffett’s favored option. However, his published letters endorse a wider view. They highlight inexpensive S&P 500 access rather than promoting a single ticker indefinitely.

U.S. cash markets did not open on Sunday. The S&P 500 advanced 1.05% over the past week. VOO increased by 1.11%, and Berkshire Hathaway was up 3.36%.

SecurityFriday closeFriday moveWeekly move
S&P 5007,489.72up 0.70%up 1.05%
Vanguard S&P 500 ETF $686.65up 0.71%up 1.11%
Berkshire Hathaway $511.54added 0.36%up 3.36%

Weekly comparisons reflect closing values from July 31 and July 24.

Buffett outlined this principle in Berkshire’s 2013 letter to shareholders. “A low-cost S&P 500 index fund will achieve this goal,” he stated. His directions for trustees allocated 90% to a very low-cost S&P fund. Berkshire Hathaway

The letter referenced Vanguard, though it did not mention a specific ETF ticker. In 2016, Buffett reiterated the broader message. He stated that low-cost index funds are suitable for all investors, regardless of size.

The distinction is important at this point. SPDR Portfolio S&P 500 ETF (NYSEARCA:SPYM) has an expense ratio of 0.02%. iShares Core S&P 500 ETF (NYSEARCA:IVV) is in line with VOO at 0.03%. SPDR S&P 500 ETF Trust charges 0.0945%.

FundExpense ratioAnnual fee on $1 millionIllustrative value after 30 years*
SPYM (NYSEARCA:SPYM)0.0200%$200$10.007 million
VOO 0.0300%$300$9.979 million
IVV (NYSEARCA:IVV)0.0300%$300$9.979 million
SPY 0.0945%$945$9.802 million

Assumes a gross annual return of 8% and annual fees deducted. Does not include taxes, spreads, or tracking differences. These figures are for illustration purposes and not projections.

The 0.01 percentage point fee difference between SPYM and VOO results in an annual savings of $100 for each $1 million invested. Over 30 years, this difference grows to approximately $27,800. SPY’s higher expense ratio creates a gap of around $205,100 compared to SPYM.

Trading priorities may still influence the selection. On Friday, the SPY saw a dollar turnover of around $46.6 billion. VOO registered $5.3 billion, IVV had $3.7 billion and SPYM posted $0.9 billion. Short-term traders might prioritize that liquidity, while longer-term investors focus on the ongoing fees.

The holdings of the funds are more important than the fees. S&P 500 funds use float-adjusted market value weighting, so the biggest positions account for a larger portion of the investment.

ExposureS&P 500 weight on July 30
Apple 7.66%
NVIDIA 7.39%
Microsoft 5.24%
Combined top three20.29%
Information technology group37.22%

Apple shares dropped 7.4% on Friday, whereas Amazon.com surged over 15%. The S&P 500 advanced 0.70%. However, decliners outpaced advancers by a ratio of 1.3-to-one.

Buffett’s argument for passive investing continues to be backed by significant historical evidence. In 2025, 79% of large-cap U.S. active funds trailed the S&P 500. Across a 15-year period, the percentage of underperforming funds climbed to 89.93%.

The benchmark remains expensive, with Friday’s trading at close to 20 times forecast earnings. According to LSEG data, the 10-year average stood at 19 times.

The key event ahead is Friday’s report on July employment. According to a Reuters survey, 83,000 jobs are forecast to be added with unemployment projected at 4.3%. Over a quarter of S&P 500 firms are due to release results as well.

Jim Baird, chief investment officer at Plante Moran Financial Advisors, anticipates “more volatility around key economic releases” as the Federal Reserve reduces its guidance. Reuters

WindowCatalystCurrent measureInvestor channel
August 3–7Second-quarter earningsOver 25% of S&P 500 firms reportAssesses profit breadth
August 7July payrolls83,000 jobs; 4.3% unemploymentRates and valuations

Risks: Elevated oil prices and Treasury yields may weigh on valuations. A decline in megacap stocks can rapidly affect cap-weighted funds. Expense ratios are subject to change, and compounding estimates are not projections.

Buffett’s advice is still unchanged. The most affordable wrapper is different now. For investors with a long-term outlook, focus and discipline are now more important than which fund name is on the product.

TS2 TECH • EXTENDED COVERAGE

Further analysis

What was Buffett’s specific suggestion, and what is the current ETF equivalent?
Buffett instructed his wife's trustee to allocate 90% to a low-fee S&P 500 index fund, with the other 10% going into short-term U.S. government bonds. He recommended Vanguard but did not provide a ticker. The VOO fund aligns most closely with his description and has a 0.03% annual fee. On July 31, three-month U.S. Treasuries offered a 3.83% yield.
What long-range return expectations should investors consider for U.S. stocks?
Vanguard’s broad U.S. equity model now estimates 10-year annualized returns between 4.2% and 6.2%. Higher valuations have reduced the previous forecast range of 4.9% to 6.9%. IVV posted a 15.47% annualized gain over the decade ended in June. The outlook is based on models and is not guaranteed. Vanguard
Are projected earnings enough to support the present valuation?
FactSet reported a P/E ratio of 19.6, which is lower than the five-year average of 19.9 but higher than the ten-year average of 19.0. Analysts project earnings growth of 29.1% for 2026. Forecasts for Q3 and Q4 are at 27.4% and 25.2%, respectively. Q2 saw significant gains from Alphabet and Amazon. When these are excluded, Q2 growth remains at 28.8%. FactSet Insight
What does the consensus suggest about the price outlook at year-end?
The S&P 500 finished at 7,489.72 on July 31. In May, Reuters’ poll set a median year-end 2026 target at 7,620, leaving only a 1.7% potential gain at current levels. June saw JPMorgan raise its target to 7,800, while Citi moved to 8,100. Forecast ranges remain broad. S&P Global
Which risk is most significant in Buffett’s S&P 500 strategy?
Concentration. Technology makes up 37.22% of the index. Apple, Nvidia and Microsoft combined represent 20.29%. Goldman forecasts firms tied to AI will contribute about half of 2026 earnings growth. A slowdown in AI investment or mega-cap earnings would weigh on the entire fund. State Street Global Advisors

Michał Rogucki is a senior markets reporter at TS2.tech, specializing in stocks, technology and macroeconomic developments. A graduate of Humboldt University of Berlin, he previously worked in investment research and market analysis before transitioning to financial journalism. He covers the trends and events that matter most to investors worldwide.

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