WOOD vs. IYM

Last updated Jun 4, 2026

WOOD (iShares Global Timber & Forestry ETF) and IYM (iShares U.S. Basic Materials ETF) are both Materials funds from iShares - WOOD tracks the S&P Global Timber & Forestry Index while IYM tracks the Dow Jones U.S. Basic Materials Index. Both are passively managed. Over the past 10 years, WOOD returned 5.20%/yr vs 11.03%/yr for IYM. A 0.74 correlation means they provide meaningful diversification when combined. WOOD charges 0.46%/yr vs 0.42%/yr for IYM.

Performance

WOOD vs. IYM - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Global Timber & Forestry ETF (WOOD) and iShares U.S. Basic Materials ETF (IYM). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, WOOD achieves a -6.95% return, which is significantly lower than IYM's 22.06% return. Over the past 10 years, WOOD has underperformed IYM with an annualized return of 5.20%, while IYM has yielded a comparatively higher 11.03% annualized return.

WOOD

• 1D: -0.73%
• 1M: -0.81%
• YTD: -6.95%
• 6M: -3.23%
• 1Y: -6.85%
• 3Y*: -0.20%
• 5Y*: -3.93%
• 10Y*: 5.20%

IYM

• 1D: -0.03%
• 1M: 4.69%
• YTD: 22.06%
• 6M: 26.46%
• 1Y: 38.20%
• 3Y*: 15.92%
• 5Y*: 7.81%
• 10Y*: 11.03%

*Multi-year figures are annualized to reflect compound growth (CAGR)

WOOD vs. IYM - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
WOOD iShares Global Timber & Forestry ETF	-6.95%	-3.27%	-4.21%	13.84%	-19.39%	17.03%	20.36%	19.75%	-17.73%	34.49%
IYM iShares U.S. Basic Materials ETF	22.06%	20.41%	-4.54%	12.83%	-9.15%	25.62%	17.87%	19.22%	-16.63%	24.83%

Correlation

The correlation between WOOD and IYM is 0.62, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.62
Correlation (3Y) Calculated over the trailing 3-year period	0.65
Correlation (5Y) Calculated over the trailing 5-year period	0.71
Correlation (10Y) Calculated over the trailing 10-year period	0.70
Correlation (All Time) Calculated using the full available price history since Jun 26, 2008	0.74

The correlation between WOOD and IYM shifts across timeframes, from 0.62 (1 year) to 0.74 (all time), reflecting how their relationship changes across market environments.

WOOD vs. IYM - Sectors Allocation Comparison

Sectors	WOOD	IYM
Basic Materials	63.6%	85.4%
Consumer Cyclical	23.5%	3.2%
Real Estate	12.9%	-
Communication Services	-	-
Consumer Defensive	-	-
Energy	-	-
Financial Services	-	-
Healthcare	-	-
Industrials	-	11.4%
Technology	-	-
Utilities	-	-

Return for Risk

WOOD vs. IYM — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

WOOD

WOOD Risk / Return Rank: 5
WOOD Sharpe Ratio Rank: 5
WOOD Sortino Ratio Rank: 5
WOOD Omega Ratio Rank: 5
WOOD Calmar Ratio Rank: 6
WOOD Martin Ratio Rank: 5

IYM

IYM Risk / Return Rank: 58
IYM Sharpe Ratio Rank: 60
IYM Sortino Ratio Rank: 57
IYM Omega Ratio Rank: 55
IYM Calmar Ratio Rank: 56
IYM Martin Ratio Rank: 60

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

WOOD vs. IYM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Global Timber & Forestry ETF (WOOD) and iShares U.S. Basic Materials ETF (IYM). 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.

	WOOD	IYM	Difference
Sharpe ratio: Return per unit of total volatility	-0.37	2.06	-2.43
Sortino ratio: Return per unit of downside risk	-0.40	2.74	-3.14
Omega ratio: Gain probability vs. loss probability	0.95	1.34	-0.39
Calmar ratio: Return relative to maximum drawdown	-0.32	2.82	-3.14
Martin ratio: Return relative to average drawdown	-0.74	10.73	-11.47
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

WOOD vs. IYM - Sharpe Ratio Comparison

The current WOOD Sharpe Ratio is -0.37, which is lower than the IYM Sharpe Ratio of 2.06. The chart below compares the historical Sharpe Ratios of WOOD and IYM, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	WOOD	IYM	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.37	2.06	-2.43
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.20	0.39	-0.59
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.24	0.51	-0.27
Sharpe Ratio (All Time) Calculated using the full available price history	0.15	0.34	-0.19

Drawdowns

WOOD vs. IYM - Drawdown Comparison

The maximum WOOD drawdown since its inception was -63.25%, smaller than the maximum IYM drawdown of -67.78%. Use the drawdown chart below to compare losses from any high point for WOOD and IYM.

Drawdown Indicators

	WOOD	IYM	Difference
Max Drawdown Largest peak-to-trough decline	-63.25%	-67.78%	+4.53%
Max Drawdown (1Y) Largest decline over 1 year	-21.64%	-13.61%	-8.03%
Max Drawdown (3Y) Largest decline over 3 years	-22.79%	-23.62%	+0.83%
Max Drawdown (5Y) Largest decline over 5 years	-30.71%	-29.94%	-0.77%
Max Drawdown (10Y) Largest decline over 10 years	-50.20%	-42.76%	-7.44%
Current Drawdown Current decline from peak	-24.31%	-0.88%	-23.43%
Average Drawdown Average peak-to-trough decline	-14.76%	-11.46%	-3.30%
Ulcer Index Depth and duration of drawdowns from previous peaks	9.27%	3.57%	+5.70%

Volatility

WOOD vs. IYM - Volatility Comparison

The current volatility for iShares Global Timber & Forestry ETF (WOOD) is 5.70%, while iShares U.S. Basic Materials ETF (IYM) has a volatility of 6.51%. This indicates that WOOD experiences smaller price fluctuations and is considered to be less risky than IYM based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	WOOD	IYM	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.70%	6.51%	-0.81%
Volatility (6M) Calculated over the trailing 6-month period	13.96%	14.86%	-0.90%
Volatility (1Y) Calculated over the trailing 1-year period	18.70%	18.67%	+0.03%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.72%	20.38%	-0.66%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.87%	21.70%	+0.17%

WOOD vs. IYM - Expense Ratio Comparison

WOOD has a 0.46% expense ratio, which is higher than IYM's 0.42% expense ratio.

Dividends

WOOD vs. IYM - Dividend Comparison

WOOD's dividend yield for the trailing twelve months is around 2.69%, more than IYM's 1.24% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IYM iShares U.S. Basic Materials ETF	1.24%	1.51%	1.65%	1.77%	2.14%	1.48%	1.39%	2.08%	1.68%	1.43%	1.47%	2.04%
WOOD iShares Global Timber & Forestry ETF	2.69%	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

Can I hold both WOOD and IYM in my portfolio?

WOOD and IYM have a correlation of 0.62, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, WOOD or IYM?

IYM has higher volatility (6.51%) compared to WOOD (5.70%). In terms of maximum drawdown, WOOD dropped -63.25% vs IYM's -67.78%.

Which ETF is better, WOOD or IYM?

On 10-year performance, IYM leads with 11.03% vs 5.20% for WOOD. On fees, IYM is cheaper at 0.42% per year. On volatility, WOOD has been the lower-risk option at 5.70%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, WOOD or IYM?

Over the 10-year period, IYM has performed better with a 11.03% return vs 5.20%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, WOOD or IYM?

IYM is cheaper with a 0.42% expense ratio, compared with 0.46% for WOOD.

Which ETF pays a higher dividend yield, WOOD or IYM?

WOOD has the higher dividend yield at 2.69%, compared with 1.24% for IYM.

What is the main difference between WOOD and IYM?

WOOD tracks S&P Global Timber & Forestry Index, while IYM tracks Dow Jones U.S. Basic Materials Index. Their fees differ too: 0.46% for WOOD and 0.42% for IYM.

Which has better risk-adjusted returns?

IYM currently has the higher Sharpe Ratio (2.06 vs -0.37), 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.