Buffett weighs S&P 500 ETF concentration over $1.29 fee difference

Buffett weighs S&P 500 ETF concentration over $1.29 fee difference

OMAHA, August 1, 2026, 11:17 CDT

  • Berkshire Hathaway advanced 3.4% over the past week. Top S&P 500 ETFs added around 1.1%.
  • Vanguard S&P 500 ETF and iShares Core S&P 500 ETF (NYSEARCA:IVV) have an expense ratio of 0.03%. SPDR S&P 500 ETF Trust applies a fee of 0.0945%.
  • As of July 30, Apple Inc. , NVIDIA Corp. , and Microsoft Corp. accounted for 20.27% of SPY.

On Thursday, SPY allocated 20.27% of its assets to three stocks. Apple, Nvidia and Microsoft all surpassed the 5% mark. If all three moved 1% in tandem, SPY would shift by roughly 0.20 percentage point, assuming no movement elsewhere.

This situation amounts to 3.1 years’ worth of the fee difference. SPY’s expense ratio stands at 0.0945%, while VOO and IVV list charges of 0.03% each. For a $2,000 investment, the yearly difference totals $1.29. Each of the three funds follows the same benchmark index.

FundJuly 31 closeExpense ratioAnnual fee on $2,000Friday volume
VOO$686.650.0300%$0.607.72 million
IVV$750.320.0300%$0.604.90 million
SPY$747.030.0945%$1.8962.45 million

Annual fee calculations are based on multiplying every ratio by $2,000. Figures for Friday’s prices and trading volumes reflect closing numbers. SPY recorded a share volume eightfold that of VOO and almost 13 times IVV’s. The fee spread stood at 6.45 basis points.

U.S. cash markets remained closed on Saturday. The previous session wrapped up a turbulent week, with the S&P 500 rising 1%. The Nasdaq finished 1.6% higher, while the Dow advanced 1%. Berkshire ended at $511.54, marking a 3.4% gain over the week.

SecurityJuly 24 closeJuly 31 closeWeekly price changeFriday change
Berkshire Class B$494.93$511.54up 3.36%up 0.36%
VOO$679.14$686.65up 1.11%up 0.71%
IVV$742.36$750.32up 1.07%up 0.69%
SPY$738.93$747.03up 1.10%up 0.72%

Weekly shifts reflect price-return figures based on the cited closing values. Berkshire outperformed the trio of ETFs by approximately 2.3 percentage points. However, this single-week advantage does not alter Buffett’s stated allocation guideline.

In his 2013 letter to shareholders, Buffett allocated 90% of a bequest to “a very low-cost S&P 500 index fund,” with the remaining 10% directed to short-term government bonds. He recommended Vanguard. Berkshire Hathaway

The referenced Motley Fool piece applies that guidance in recommending VOO. Vanguard reports an expense ratio of 0.03% for the fund, with a market price of $686.65 as of Friday.

The standalone Moneywise piece focuses on family choices rather than investment portfolios. All three of Buffett’s children did not complete college degrees. Susie was three credits short of graduation, while Howard and Peter also did not finish. According to the report, Buffett allowed them freedom to decide on the careers they found best.

Their professional paths took different directions. Susie pursued work in education and charitable causes, while Howard focused on agriculture and environmental stewardship. Peter went on to establish himself both as a composer and benefactor. Both reports indicate Buffett establishes boundaries but allows room for individual decisions.

The index fund remains heavily tilted toward a few large-cap stocks. According to Thursday’s official SPY weightings, just three firms exert significant influence over the portfolio.

SPY holdingWeight as of July 30Projected SPY shift on a 1% stock move
Apple7.65%0.0765 percentage point
Nvidia7.38%0.0738 percentage point
Microsoft5.24%0.0524 percentage point
Combined20.27%0.2027 percentage point

Estimates are based on a 1% move in the stock and all other factors unchanged. The combined scenario equates to 3.1 times the annual fee spread. Changing S&P 500 wrappers does not diminish that risk, but a shift in asset allocation can.

A direct test is ahead next week. A Reuters poll projects July payrolls will increase by 83,000, and forecasts unemployment at 4.3% on August 7. Over a quarter of S&P 500 firms are scheduled to release results. Adjusted quarterly profit is currently running 29.3% higher than a year earlier.

Next-week itemTimingPreliminary baselineMain market channel
July payroll dataAugust 7Expected gain of 83,000 jobs; unemployment at 4.3%Interest rate outlook
S&P 500 earningsAugust 3-7Over 25% of firms reporting; annual profit up 29.3%Major earnings impact
September Fed rateStart of the weekOdds of rate hike at 64%Stock valuations

Initial market expectations for the poll, earnings speed, and interest rate likelihood are reflected in estimates. Yung-Yu Ma, chief investment strategist at PNC Financial Services Group , stated the market was “searching to regain its footing.” He also noted that earnings “should provide stability.” Reuters

Risks: Payroll figures exceeding expectations may boost speculation on rate hikes. A downturn in mega-cap tech stocks would impact all three ETFs at once. Minimal fees do not guard against declines in valuations.

An investor with $2,000 would save $1.29 each year by switching from SPY to VOO. To reduce Thursday’s 20.27% weighting, it is necessary to invest beyond the same index.

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Further analysis

Is Berkshire close to being fully priced at around $512?
BRK.B ended July 31 at $511.54, trading around 1% under its 52-week peak. According to FactSet, the average price target is $513.64, pointing to a slim potential gain of about 0.4%. The median projection stands at $503, which is below the recent closing level. Analyst targets span from $463.57 to $585. The consensus is Hold, with just eight analysts covering the stock. The Wall Street Journal
What are analysts on Wall Street predicting for the upcoming earnings release?
Estimates vary among analysts. FactSet lists Q2 EPS at $5.04 per Class B share, while Zacks reports $5.24. The same period a year earlier posted $5.17. FactSet projects full-year earnings at $20.86, a 2.9% decrease from 2025. Berkshire has cautioned that unrealized equity gains or losses may skew its quarterly net results. The Wall Street Journal
Did operating growth in the first quarter match initial impressions of strength?
First-quarter operating earnings climbed 17.7% to $11.346 billion. The “Other” segment accounted for $1.219 billion, equivalent to 72% of the overall growth. A currency fluctuation of $962 million contributed significantly to that segment’s result. Insurance underwriting improved by 28.5%, while investment income dropped by 7.4%. The headline figure was robust, although the composition was less stable.
Is Greg Abel able to reduce Berkshire’s market gap by deploying capital?
Abel took over as CEO on January 1, while Buffett continues as chairman. As of July 31, BRK.B rose 1.77%, compared to a 9.41% increase for the S&P 500. Berkshire Hathaway Net cash and Treasury bills stood at $373.5 billion in March. Berkshire finalized the OxyChem acquisition at a disclosed price of nearly $9.7 billion. Taylor Morrison's equity value was $6.8 billion. Berkshire committed to a $10 billion investment in Alphabet. Combined, these outlays amount to $26.5 billion, around 7% of March liquidity. Share buybacks in Q1 totaled approximately $234 million. The majority of liquidity remains uninvested.
What risks might undermine the earnings outlook?
GEICO reported a 35% drop in pre-tax underwriting profit in Q1. Claims expenses and marketing spending increased. Abel noted insurance pricing was easing as more capital moved into the industry. Some consumer segments posted lower revenue due to reduced confidence. Taylor Morrison has increased Berkshire’s link to the housing sector. BNSF’s profit rose 13% in Q1, partially balancing declines. Reuters

Khadija Saeed is a financial markets reporter at TS2.tech, specializing in stocks, technology and emerging industries. She studied economics and finance at the London School of Economics and previously worked in market research before moving into financial journalism. Her coverage focuses on the companies, innovations and economic trends influencing global investors. Follow Khadija Saeed on Google News.

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