WOOD vs. BRK-B
WOOD (iShares Global Timber & Forestry ETF) is Materials fund tracking the S&P Global Timber & Forestry Index, while BRK-B (Berkshire Hathaway Inc.) is a stock. Over the past 10 years, WOOD returned 5.97%/yr vs 13.43%/yr for BRK-B. A 0.56 correlation means they provide meaningful diversification when combined.
Performance
WOOD vs. BRK-B - Performance Comparison
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Returns By Period
In the year-to-date period, WOOD achieves a -7.28% return, which is significantly lower than BRK-B's -1.96% return. Over the past 10 years, WOOD has underperformed BRK-B with an annualized return of 5.97%, while BRK-B has yielded a comparatively higher 13.43% annualized return.
WOOD
- 1D
- -1.42%
- 1M
- 1.59%
- YTD
- -7.28%
- 6M
- -6.36%
- 1Y
- -6.77%
- 3Y*
- -0.01%
- 5Y*
- -3.45%
- 10Y*
- 5.97%
BRK-B
- 1D
- 0.84%
- 1M
- 1.32%
- YTD
- -1.96%
- 6M
- -1.54%
- 1Y
- 1.03%
- 3Y*
- 13.70%
- 5Y*
- 12.33%
- 10Y*
- 13.43%
WOOD vs. BRK-B - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
WOOD iShares Global Timber & Forestry ETF | -7.28% | -3.27% | -4.21% | 13.84% | -19.39% | 17.03% | 20.36% | 19.75% | -17.73% | 34.49% |
BRK-B Berkshire Hathaway Inc. | -1.96% | 10.89% | 27.09% | 15.46% | 3.31% | 28.95% | 2.37% | 10.93% | 3.01% | 21.62% |
Correlation
The correlation between WOOD and BRK-B is 0.27, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.27 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.32 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.45 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.51 |
Correlation (All Time) Calculated using the full available price history since Jun 25, 2008 | 0.56 |
Over the past year, the correlation between WOOD and BRK-B has dropped to 0.27 - well below their long-term average of 0.56, suggesting their price drivers have been diverging.
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Return for Risk
WOOD vs. BRK-B — Risk / Return Rank
WOOD
BRK-B
WOOD vs. BRK-B - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Global Timber & Forestry ETF (WOOD) and Berkshire Hathaway Inc. (BRK-B). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| WOOD | BRK-B | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.43 | ||
| Sortino ratioReturn per unit of downside risk | -0.59 | ||
| Omega ratioGain probability vs. loss probability | 0.96 | 1.02 | -0.07 |
| Calmar ratioReturn relative to maximum drawdown | -0.31 | 0.11 | -0.42 |
| Martin ratioReturn relative to average drawdown | -0.67 | 0.23 | -0.89 |
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Drawdowns
WOOD vs. BRK-B - Drawdown Comparison
The maximum WOOD drawdown since its inception was -63.25%, which is greater than BRK-B's maximum drawdown of -53.86%. Use the drawdown chart below to compare losses from any high point for WOOD and BRK-B.
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Drawdown Indicators
| WOOD | BRK-B | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -63.25% | -53.86% | -9.39% |
Max Drawdown (1Y)Largest decline over 1 year | -21.64% | -9.42% | -12.22% |
Max Drawdown (3Y)Largest decline over 3 years | -22.79% | -14.95% | -7.84% |
Max Drawdown (5Y)Largest decline over 5 years | -30.71% | -26.58% | -4.13% |
Max Drawdown (10Y)Largest decline over 10 years | -50.20% | -29.57% | -20.63% |
Current DrawdownCurrent decline from peak | -24.58% | -8.71% | -15.87% |
Average DrawdownAverage peak-to-trough decline | -14.79% | -11.07% | -3.72% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 10.14% | 4.57% | +5.57% |
Volatility
WOOD vs. BRK-B - Volatility Comparison
iShares Global Timber & Forestry ETF (WOOD) has a higher volatility of 5.12% compared to Berkshire Hathaway Inc. (BRK-B) at 3.75%. This indicates that WOOD's price experiences larger fluctuations and is considered to be riskier than BRK-B based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| WOOD | BRK-B | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 5.12% | 3.75% | +1.37% |
Volatility (6M)Calculated over the trailing 6-month period | 14.22% | 10.63% | +3.59% |
Volatility (1Y)Calculated over the trailing 1-year period | 18.90% | 14.39% | +4.51% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 19.74% | 17.10% | +2.64% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 21.76% | 19.39% | +2.37% |
Dividends
WOOD vs. BRK-B - Dividend Comparison
WOOD's dividend yield for the trailing twelve months is around 2.55%, while BRK-B has not paid dividends to shareholders.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
BRK-B Berkshire Hathaway Inc. | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
WOOD iShares Global Timber & Forestry ETF | 2.55% | 2.51% | 2.09% | 1.64% | 2.26% | 1.24% | 0.98% | 1.85% | 2.82% | 1.19% | 1.65% | 2.04% |
Frequently Asked Questions
WOOD and BRK-B have a correlation of 0.27, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
WOOD has higher volatility (5.12%) compared to BRK-B (3.75%). In terms of maximum drawdown, WOOD dropped -63.25% vs BRK-B's -53.86%.
BRK-B currently has the higher Sharpe Ratio (0.07 vs -0.36), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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