ERO vs. CPER
ERO (Ero Copper Corp) is a stock, while CPER (United States Copper Index Fund) is Copper fund tracking the SummerHaven Copper Index Total Return. Over the past 5 years, ERO returned 7.76%/yr vs 8.01%/yr for CPER. At a 0.48 correlation, their price movements are largely independent.
Performance
ERO vs. CPER - Performance Comparison
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Returns By Period
In the year-to-date period, ERO achieves a 7.64% return, which is significantly lower than CPER's 11.01% return.
ERO
- 1D
- 2.35%
- 1M
- 12.86%
- YTD
- 7.64%
- 6M
- 13.49%
- 1Y
- 99.80%
- 3Y*
- 15.10%
- 5Y*
- 7.76%
- 10Y*
- —
CPER
- 1D
- -0.13%
- 1M
- -0.28%
- YTD
- 11.01%
- 6M
- 15.06%
- 1Y
- 28.13%
- 3Y*
- 18.14%
- 5Y*
- 8.01%
- 10Y*
- 10.81%
ERO vs. CPER - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
ERO Ero Copper Corp | 7.64% | 109.87% | -14.63% | 14.84% | -10.07% | -5.73% | -10.97% | 151.68% | 21.41% | 52.76% |
CPER United States Copper Index Fund | 11.01% | 38.95% | 4.23% | 4.55% | -15.14% | 25.21% | 23.90% | 6.66% | -21.91% | 4.00% |
Correlation
The correlation between ERO and CPER is 0.60, 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 | 0.60 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.61 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.59 |
Correlation (All Time) Calculated using the full available price history since Oct 23, 2017 | 0.48 |
The correlation between ERO and CPER shifts across timeframes, from 0.48 (all time) to 0.61 (3 years), reflecting how their relationship changes across market environments.
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Return for Risk
ERO vs. CPER — Risk / Return Rank
ERO
CPER
ERO vs. CPER - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Ero Copper Corp (ERO) 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.
| ERO | CPER | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.93 | ||
| Sortino ratioReturn per unit of downside risk | +0.98 | ||
| Omega ratioGain probability vs. loss probability | 1.28 | 1.19 | +0.09 |
| Calmar ratioReturn relative to maximum drawdown | 2.64 | 1.14 | +1.50 |
| Martin ratioReturn relative to average drawdown | 5.57 | 2.36 | +3.21 |
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Drawdowns
ERO vs. CPER - Drawdown Comparison
The maximum ERO drawdown since its inception was -67.17%, which is greater than CPER's maximum drawdown of -54.04%. Use the drawdown chart below to compare losses from any high point for ERO and CPER.
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Drawdown Indicators
| ERO | CPER | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -67.17% | -54.04% | -13.13% |
Max Drawdown (1Y)Largest decline over 1 year | -37.97% | -24.77% | -13.20% |
Max Drawdown (3Y)Largest decline over 3 years | -59.84% | -24.77% | -35.07% |
Max Drawdown (5Y)Largest decline over 5 years | -61.02% | -34.75% | -26.27% |
Max Drawdown (10Y)Largest decline over 10 years | — | -38.42% | — |
Current DrawdownCurrent decline from peak | -19.93% | -4.41% | -15.52% |
Average DrawdownAverage peak-to-trough decline | -27.02% | -25.33% | -1.69% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 17.98% | 11.96% | +6.02% |
Volatility
ERO vs. CPER - Volatility Comparison
Ero Copper Corp (ERO) has a higher volatility of 24.57% compared to United States Copper Index Fund (CPER) at 8.46%. This indicates that ERO's price experiences larger fluctuations and is considered to be riskier than CPER based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| ERO | CPER | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 24.57% | 8.46% | +16.11% |
Volatility (6M)Calculated over the trailing 6-month period | 47.54% | 23.27% | +24.27% |
Volatility (1Y)Calculated over the trailing 1-year period | 57.85% | 34.91% | +22.94% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 54.84% | 27.02% | +27.82% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 59.35% | 24.09% | +35.26% |
Dividends
ERO vs. CPER - Dividend Comparison
Neither ERO nor CPER has paid dividends to shareholders.
Frequently Asked Questions
ERO and CPER have a correlation of 0.60, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
ERO has higher volatility (24.57%) compared to CPER (8.46%). In terms of maximum drawdown, ERO dropped -67.17% vs CPER's -54.04%.
ERO currently has the higher Sharpe Ratio (1.74 vs 0.81), 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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