CPER vs. WDIG

Last updated Jun 4, 2026

CPER (United States Copper Index Fund) and WDIG (WisdomTree Efficient Rare Earth Plus Strategic Metals Fund) are both exchange-traded funds - CPER is a Metals fund tracking the SummerHaven Copper Index Total Return, while WDIG is a Commodities fund actively managed by WisdomTree. CPER is passively managed, while WDIG is actively managed. A 0.70 correlation means they provide meaningful diversification when combined. CPER charges 1.06%/yr vs 0.55%/yr for WDIG.

Performance

CPER vs. WDIG - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in United States Copper Index Fund (CPER) and WisdomTree Efficient Rare Earth Plus Strategic Metals Fund (WDIG). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

CPER

• 1D: -2.91%
• 1M: 10.79%
• YTD: 12.76%
• 6M: 19.35%
• 1Y: 29.71%
• 3Y*: 19.71%
• 5Y*: 7.21%
• 10Y*: 10.91%

WDIG

• 1D: -4.03%
• 1M: —
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

CPER vs. WDIG - Yearly Performance Comparison

	2026 (YTD)
CPER United States Copper Index Fund	5.54%
WDIG WisdomTree Efficient Rare Earth Plus Strategic Metals Fund	1.18%

Correlation

The correlation between CPER and WDIG is 0.70, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (All Time) Calculated using the full available price history since May 8, 2026	0.70

Return for Risk

CPER vs. WDIG — Risk / Return Rank

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

CPER

CPER Risk / Return Rank: 24
CPER Sharpe Ratio Rank: 24
CPER Sortino Ratio Rank: 22
CPER Omega Ratio Rank: 30
CPER Calmar Ratio Rank: 25
CPER Martin Ratio Rank: 21

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.

CPER vs. WDIG - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for United States Copper Index Fund (CPER) and WisdomTree Efficient Rare Earth Plus Strategic Metals Fund (WDIG). 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.

	CPER	WDIG	Difference
Sharpe ratio Return per unit of total volatility	0.87	—	—
Sortino ratio Return per unit of downside risk	1.22	—	—
Omega ratio Gain probability vs. loss probability	1.20	—	—
Calmar ratio Return relative to maximum drawdown	1.20	—	—
Martin ratio Return relative to average drawdown	2.50	—	—
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

Sharpe Ratios by Period

	CPER	WDIG	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.87	—	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.27	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.46	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.13	0.35	-0.22

Drawdowns

CPER vs. WDIG - Drawdown Comparison

The maximum CPER drawdown since its inception was -54.04%, which is greater than WDIG's maximum drawdown of -15.71%. Use the drawdown chart below to compare losses from any high point for CPER and WDIG.

Drawdown Indicators

	CPER	WDIG	Difference
Max Drawdown Largest peak-to-trough decline	-54.04%	-15.71%	-38.33%
Max Drawdown (1Y) Largest decline over 1 year	-24.77%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-24.77%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-34.75%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-38.42%	—	—
Current Drawdown Current decline from peak	-2.91%	-5.40%	+2.49%
Average Drawdown Average peak-to-trough decline	-25.41%	-6.14%	-19.27%
Ulcer Index Depth and duration of drawdowns from previous peaks	11.93%	—	—

Volatility

Volatility by Period

	CPER	WDIG	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.73%	—	—
Volatility (6M) Calculated over the trailing 6-month period	22.85%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	34.48%	52.06%	-17.58%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	26.97%	52.06%	-25.09%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	24.04%	52.06%	-28.02%

CPER vs. WDIG - Expense Ratio Comparison

CPER has a 1.06% expense ratio, which is higher than WDIG's 0.55% expense ratio.

Dividends

CPER vs. WDIG - Dividend Comparison

Neither CPER nor WDIG has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both CPER and WDIG in my portfolio?

CPER and WDIG have a correlation of 0.70, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, CPER or WDIG?

On fees, WDIG is cheaper at 0.55% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, CPER or WDIG?

WDIG is cheaper with a 0.55% expense ratio, compared with 1.06% for CPER.

Which ETF pays a higher dividend yield, CPER or WDIG?

CPER and WDIG have nearly identical dividend yields, around 0.00%.

What is the main difference between CPER and WDIG?

CPER is categorized as Metals, while WDIG is Commodities. They also come from different issuers: USCF and WisdomTree. Their fees differ too: 1.06% for CPER and 0.55% for WDIG.