COAL vs. ROBO

Last updated Jun 23, 2026

COAL (Range Global Coal Index ETF) and ROBO (ROBO Global Robotics & Automation Index ETF) are both exchange-traded funds - COAL is a Energy Equities fund tracking the VettaFi Global Coal Index, while ROBO is a Robotics fund tracking the ROBO Global Robotics and Automation TR Index. Both are passively managed. Over the past year, COAL returned 44.31% vs 54.66% for ROBO. At a 0.39 correlation, their price movements are largely independent. COAL charges 0.85%/yr vs 0.95%/yr for ROBO.

Performance

COAL vs. ROBO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Range Global Coal Index ETF (COAL) and ROBO Global Robotics & Automation Index ETF (ROBO). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, COAL achieves a 5.74% return, which is significantly lower than ROBO's 25.02% return.

COAL

• 1D: -0.90%
• 1M: -1.99%
• YTD: 5.74%
• 6M: 6.40%
• 1Y: 44.31%
• 3Y*: —
• 5Y*: —
• 10Y*: —

ROBO

• 1D: 0.76%
• 1M: -0.74%
• YTD: 25.02%
• 6M: 24.43%
• 1Y: 54.66%
• 3Y*: 15.63%
• 5Y*: 6.41%
• 10Y*: 13.65%

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

COAL vs. ROBO - Yearly Performance Comparison

	2026 (YTD)	2025	2024
COAL Range Global Coal Index ETF	5.74%	12.65%	-17.23%
ROBO ROBO Global Robotics & Automation Index ETF	25.02%	23.71%	0.83%

Correlation

The correlation between COAL and ROBO is 0.28, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.28
Correlation (All Time) Calculated using the full available price history since Jan 24, 2024	0.39

The correlation between COAL and ROBO shifts across timeframes, from 0.28 (1 year) to 0.39 (all time), reflecting how their relationship changes across market environments.

COAL vs. ROBO - Sectors Allocation Comparison

Sectors	COAL	ROBO
Energy	48.2%	-
Basic Materials	45.0%	-
Industrials	6.9%	45.3%
Communication Services	-	1.4%
Consumer Cyclical	-	3.1%
Consumer Defensive	-	1.3%
Financial Services	-	1.9%
Healthcare	-	4.6%
Real Estate	-	-
Technology	-	43.6%
Utilities	-	-

Return for Risk

COAL vs. ROBO — Risk / Return Rank

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

COAL

COAL Risk / Return Rank: 46
COAL Sharpe Ratio Rank: 44
COAL Sortino Ratio Rank: 44
COAL Omega Ratio Rank: 39
COAL Calmar Ratio Rank: 60
COAL Martin Ratio Rank: 41

ROBO

ROBO Risk / Return Rank: 67
ROBO Sharpe Ratio Rank: 72
ROBO Sortino Ratio Rank: 65
ROBO Omega Ratio Rank: 64
ROBO Calmar Ratio Rank: 66
ROBO Martin Ratio Rank: 67

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.

COAL vs. ROBO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Range Global Coal Index ETF (COAL) and ROBO Global Robotics & Automation Index ETF (ROBO). 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.

	COAL	ROBO	Difference
Sharpe ratio: Return per unit of total volatility	1.47	2.23	-0.76
Sortino ratio: Return per unit of downside risk	2.16	2.89	-0.73
Omega ratio: Gain probability vs. loss probability	1.25	1.37	-0.12
Calmar ratio: Return relative to maximum drawdown	2.89	3.17	-0.28
Martin ratio: Return relative to average drawdown	6.50	11.92	-5.42

COAL vs. ROBO - Sharpe Ratio Comparison

The current COAL Sharpe Ratio is 1.47, which is lower than the ROBO Sharpe Ratio of 2.23. The chart below compares the historical Sharpe Ratios of COAL and ROBO, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

COAL vs. ROBO - Drawdown Comparison

The maximum COAL drawdown since its inception was -42.29%, roughly equal to the maximum ROBO drawdown of -43.65%. Use the drawdown chart below to compare losses from any high point for COAL and ROBO.

Drawdown Indicators

	COAL	ROBO	Difference
Max Drawdown Largest peak-to-trough decline	-42.29%	-43.65%	+1.36%
Max Drawdown (1Y) Largest decline over 1 year	-15.42%	-17.35%	+1.93%
Max Drawdown (3Y) Largest decline over 3 years	—	-27.92%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-43.65%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-43.65%	—
Current Drawdown Current decline from peak	-15.07%	-4.08%	-10.99%
Average Drawdown Average peak-to-trough decline	-14.17%	-12.91%	-1.26%
Ulcer Index Depth and duration of drawdowns from previous peaks	6.84%	4.60%	+2.24%

Volatility

COAL vs. ROBO - Volatility Comparison

Range Global Coal Index ETF (COAL) has a higher volatility of 12.40% compared to ROBO Global Robotics & Automation Index ETF (ROBO) at 10.76%. This indicates that COAL's price experiences larger fluctuations and is considered to be riskier than ROBO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	COAL	ROBO	Difference
Volatility (1M) Calculated over the trailing 1-month period	12.40%	10.76%	+1.64%
Volatility (6M) Calculated over the trailing 6-month period	21.86%	19.98%	+1.88%
Volatility (1Y) Calculated over the trailing 1-year period	30.27%	24.69%	+5.58%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	27.77%	23.98%	+3.79%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	27.77%	23.32%	+4.45%

COAL vs. ROBO - Expense Ratio Comparison

COAL has a 0.85% expense ratio, which is lower than ROBO's 0.95% expense ratio.

Dividends

COAL vs. ROBO - Dividend Comparison

COAL's dividend yield for the trailing twelve months is around 2.49%, more than ROBO's 0.34% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
COAL Range Global Coal Index ETF	2.49%	2.63%	1.80%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
ROBO ROBO Global Robotics & Automation Index ETF	0.34%	0.42%	0.55%	0.05%	0.00%	0.18%	0.20%	0.37%	0.37%	0.02%	0.19%	0.28%

Frequently Asked Questions

Can I hold both COAL and ROBO in my portfolio?

COAL and ROBO have a correlation of 0.28, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, COAL or ROBO?

COAL has higher volatility (12.40%) compared to ROBO (10.76%). In terms of maximum drawdown, COAL dropped -42.29% vs ROBO's -43.65%.

Which ETF is better, COAL or ROBO?

On 1-year performance, ROBO leads with 54.66% vs 44.31% for COAL. On fees, COAL is cheaper at 0.85% per year. On volatility, ROBO has been the lower-risk option at 10.76%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, COAL or ROBO?

Over the 1-year period, ROBO has performed better with a 54.66% return vs 44.31%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, COAL or ROBO?

COAL is cheaper with a 0.85% expense ratio, compared with 0.95% for ROBO.

Which ETF pays a higher dividend yield, COAL or ROBO?

COAL has the higher dividend yield at 2.49%, compared with 0.34% for ROBO.

What is the main difference between COAL and ROBO?

COAL is categorized as Energy Equities, while ROBO is Robotics. COAL tracks VettaFi Global Coal Index, while ROBO tracks ROBO Global Robotics and Automation TR Index. Their fees differ too: 0.85% for COAL and 0.95% for ROBO.

Which has better risk-adjusted returns?

ROBO currently has the higher Sharpe Ratio (2.23 vs 1.47), 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.