WDIG vs. CPER

Last updated Aug 1, 2026

WDIG (WisdomTree Efficient Rare Earth Plus Strategic Metals Fund) and CPER (United States Copper Index Fund) are both exchange-traded funds - WDIG is a Rare Earth & Strategic Metals fund actively managed by WisdomTree, while CPER is a Copper fund tracking the SummerHaven Copper Index Total Return. WDIG is actively managed, while CPER is passively managed. Their correlation of 0.83 means they have usually moved in the same direction. WDIG charges 0.55%/yr vs 1.06%/yr for CPER.

Performance

WDIG vs. CPER - Performance Comparison

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

Returns By Period

WDIG

• 1D: -0.38%
• 1M: -5.74%
• 6M: —
• YTD: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: —

CPER

• 1D: 0.56%
• 1M: 6.09%
• 6M: 8.59%
• YTD: 13.16%
• 1Y: 43.49%
• 3Y*: 17.80%
• 5Y*: 7.64%
• 10Y*: 10.57%
• ALL TIME*: 3.14%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
CPER United States Copper Index Fund	$16.98M	$14.74M	$24.58M
WDIG WisdomTree Efficient Rare Earth Plus Strategic Metals Fund	$54.15K	$50.36K	$175.27K

WDIG vs. CPER - Yearly Performance Comparison

	2026 (YTD)
WDIG WisdomTree Efficient Rare Earth Plus Strategic Metals Fund	-28.09%
CPER United States Copper Index Fund	5.38%

Correlation

The correlation between WDIG and CPER is 0.83, meaning they have usually moved in the same direction, including during past declines.

	Correlation
Correlation (All Time) Calculated using the full available price history since May 7, 2026	0.83

Return for Risk

WDIG vs. CPER — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

WDIG

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

CPER

CPER Risk / Return Rank: 70
CPER Sharpe Ratio Rank: 70
CPER Sortino Ratio Rank: 65
CPER Omega Ratio Rank: 67
CPER Calmar Ratio Rank: 77
CPER Martin Ratio Rank: 69

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

WDIG vs. CPER - Risk-Adjusted Trends Comparison

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

	WDIG	CPER	Difference
Sharpe ratio: Return per unit of total volatility	—	1.58	—
Sortino ratio: Return per unit of downside risk	—	2.15	—
Omega ratio: Gain probability vs. loss probability	—	1.28	—
Calmar ratio: Return relative to maximum drawdown	—	2.70	—
Martin ratio: Return relative to average drawdown	—	8.40	—

Drawdowns

WDIG vs. CPER - Drawdown Comparison

The maximum WDIG drawdown since its inception was -32.81%, smaller than the maximum CPER drawdown of -54.04%. Use the drawdown chart below to compare losses from any high point for WDIG and CPER.

Drawdown Indicators

	WDIG	CPER	Difference
Max Drawdown Largest peak-to-trough decline	-32.81%	-54.04%	+21.23%
Max Drawdown (1Y) Largest decline over 1 year	—	-16.43%	—
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	-29.73%	-2.56%	-27.17%
Average Drawdown Average peak-to-trough decline	-18.02%	-25.19%	+7.17%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	5.26%	—

Volatility

Volatility by Period

	WDIG	CPER	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	6.29%	—
Volatility (6M) Calculated over the trailing 6-month period	—	21.59%	—
Volatility (1Y) Calculated over the trailing 1-year period	53.76%	28.15%	+25.61%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	53.76%	27.08%	+26.68%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	53.76%	24.11%	+29.65%

WDIG vs. CPER - Expense Ratio Comparison

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

Dividends

WDIG vs. CPER - Dividend Comparison

Neither WDIG nor CPER has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both WDIG and CPER in my portfolio?

WDIG and CPER have a correlation of 0.83, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, WDIG or CPER?

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, WDIG or CPER?

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

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

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

What is the main difference between WDIG and CPER?

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