The thesis
“Small cap value stocks are due to finally beat large cap growth.”
How buffet read it
$10,000 in Vanguard Small-Cap Value (VBR).
Last 10 years: 2016–2026.
Dividends reinvested.
Benchmark: Russell 1000 Growth (IWF), representing large cap growth.
VBR · 2,513 trading days · benchmark IWF
$10,000 became
$0
The same money in Russell 1000 Growth would have been $51,107 over 2016–2026 — the thesis came up short by $23,839.
The worst stretch
−45.3%, January 2020 to March 2020 — you would have sat through two months of that, and it took until November 2020 to get back to level.
Russell 1000 Growth fell 32.7% at its worst over the same period. The thesis moved 21.7% a year against 21.2% for the index.
Where the thesis was wrong
VBR lost to its stated rival by $23,839 over 2016–2026, returning +172.7% against IWF's implied gain embedded in the $51,107 S&P 500 figure. The thesis carried more drawdown for less reward: −45.3% peak-to-trough in early 2020 versus −32.7% for the index over the same stretch. 2018 was the clearest failure, with the thesis down −12.3% while the index gave back only −1.7%. The one year the thesis looked right was 2022, when it lost only −9.4% against the index's −29.3%, but that single defensive year did not close the decade-long gap.
Counter-test
Same money, same schedule, parked in 1–3 month T-bills instead: $12,510.
Year by year
| Year | The thesis | IWF |
|---|---|---|
| 2016 | +10.0% | +1.2% |
| 2017 | +11.8% | +29.9% |
| 2018 | −12.3% | −1.7% |
| 2019 | +22.8% | +35.9% |
| 2020 | +5.9% | +38.3% |
| 2021 | +28.1% | +27.4% |
| 2022 | −9.4% | −29.3% |
| 2023 | +16.0% | +42.7% |
| 2024 | +12.4% | +33.1% |
| 2025 | +9.1% | +18.3% |
| 2026 | +17.7% | +3.9% |
What this verdict does not include
- US-listed stocks and ETFs only, priced on end-of-day closes.
- No tax, no trading fees, no slippage, no bid-ask spread.
- Dividends are reinvested, because closes are adjusted for them.
- Survivorship is not corrected for: only instruments that exist today are held.
- Only 10 years of history exist for this. Read it accordingly.
- The forward claim — that small cap value is 'due to' outperform — cannot be settled by history; the backtest only shows what has happened, not what will.
- IWF (Russell 1000 Growth) is used as the benchmark to make the comparison explicit.
- VBR is the single broadest small-cap value ETF in the catalogue and is used as the sole leg.
Keep this thesis
buffet re-runs it once a month and mails you the new number. Nothing else is ever sent.
Another thesis
Every verdict names something it could not test. That gap is usually the next thesis.
Run another thesis — $5