COPX vs. DRAM

Last updated Jun 9, 2026

COPX (Global X Copper Miners ETF) and DRAM (Roundhill Memory ETF) are both exchange-traded funds - COPX is a Materials fund tracking the Solactive Global Copper Miners Total Return Index, while DRAM is a Technology Equities fund actively managed by Roundhill. COPX is passively managed, while DRAM is actively managed. A 0.61 correlation means they provide meaningful diversification when combined. Both charge a 0.65% expense ratio.

Performance

COPX vs. DRAM - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Global X Copper Miners ETF (COPX) and Roundhill Memory ETF (DRAM). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

COPX

• 1D: 0.81%
• 1M: -5.44%
• YTD: 13.23%
• 6M: 23.36%
• 1Y: 93.73%
• 3Y*: 32.33%
• 5Y*: 18.13%
• 10Y*: 20.76%

DRAM

• 1D: 8.48%
• 1M: 14.62%
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

COPX vs. DRAM - Yearly Performance Comparison

	2026 (YTD)
COPX Global X Copper Miners ETF	4.02%
DRAM Roundhill Memory ETF	124.15%

Correlation

The correlation between COPX and DRAM is 0.61, 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 Apr 2, 2026	0.61

COPX vs. DRAM - Sectors Allocation Comparison

Sectors	COPX	DRAM
Basic Materials	96.3%	-
Industrials	3.7%	-
Communication Services	-	-
Consumer Cyclical	-	-
Consumer Defensive	-	-
Energy	-	-
Financial Services	-	-
Healthcare	-	-
Real Estate	-	-
Technology	-	100.0%
Utilities	-	-

Return for Risk

COPX vs. DRAM — Risk / Return Rank

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

COPX

COPX Risk / Return Rank: 67
COPX Sharpe Ratio Rank: 76
COPX Sortino Ratio Rank: 60
COPX Omega Ratio Rank: 62
COPX Calmar Ratio Rank: 74
COPX Martin Ratio Rank: 65

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.

COPX vs. DRAM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Global X Copper Miners ETF (COPX) and Roundhill Memory ETF (DRAM). 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.

	COPX	DRAM	Difference
Sharpe ratio: Return per unit of total volatility	2.20	—	—
Sortino ratio: Return per unit of downside risk	2.54	—	—
Omega ratio: Gain probability vs. loss probability	1.34	—	—
Calmar ratio: Return relative to maximum drawdown	3.39	—	—
Martin ratio: Return relative to average drawdown	10.72	—	—
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

	COPX	DRAM	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.20	—	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.50	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.58	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.17	91.43	-91.26

Drawdowns

COPX vs. DRAM - Drawdown Comparison

The maximum COPX drawdown since its inception was -83.16%, which is greater than DRAM's maximum drawdown of -19.97%. Use the drawdown chart below to compare losses from any high point for COPX and DRAM.

Drawdown Indicators

	COPX	DRAM	Difference
Max Drawdown Largest peak-to-trough decline	-83.16%	-19.97%	-63.19%
Max Drawdown (1Y) Largest decline over 1 year	-27.82%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-39.72%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-42.12%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-65.41%	—	—
Current Drawdown Current decline from peak	-15.06%	-13.18%	-1.88%
Average Drawdown Average peak-to-trough decline	-39.28%	-2.40%	-36.88%
Ulcer Index Depth and duration of drawdowns from previous peaks	8.78%	—	—

Volatility

Volatility by Period

	COPX	DRAM	Difference
Volatility (1M) Calculated over the trailing 1-month period	18.19%	—	—
Volatility (6M) Calculated over the trailing 6-month period	37.27%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	42.89%	85.85%	-42.96%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	36.80%	85.85%	-49.05%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	35.68%	85.85%	-50.17%

COPX vs. DRAM - Expense Ratio Comparison

Both COPX and DRAM have an expense ratio of 0.65%.

Dividends

COPX vs. DRAM - Dividend Comparison

COPX's dividend yield for the trailing twelve months is around 2.36%, while DRAM has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
COPX Global X Copper Miners ETF	2.36%	2.68%	1.80%	2.39%	3.14%	1.48%	1.30%	1.37%	2.59%	1.57%	0.60%	1.20%
DRAM Roundhill Memory ETF	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both COPX and DRAM in my portfolio?

COPX and DRAM have a correlation of 0.61, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, COPX or DRAM?

Both ETFs have the same 0.65% expense ratio. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, COPX or DRAM?

COPX and DRAM have the same expense ratio: 0.65% per year.

Which ETF pays a higher dividend yield, COPX or DRAM?

COPX has the higher dividend yield at 2.36%, compared with 0.00% for DRAM.

What is the main difference between COPX and DRAM?

COPX is categorized as Materials, while DRAM is Technology Equities. They also come from different issuers: Global X and Roundhill.