COHR vs. ROBO

Last updated Jun 13, 2026

COHR (Coherent, Inc.) is a stock, while ROBO (ROBO Global Robotics & Automation Index ETF) is Robotics fund tracking the ROBO Global Robotics and Automation TR Index. Over the past 10 years, COHR returned 34.35%/yr vs 13.12%/yr for ROBO. A 0.61 correlation means they provide meaningful diversification when combined.

Performance

COHR vs. ROBO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Coherent, Inc. (COHR) 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, COHR achieves a 108.61% return, which is significantly higher than ROBO's 19.75% return. Over the past 10 years, COHR has outperformed ROBO with an annualized return of 34.35%, while ROBO has yielded a comparatively lower 13.12% annualized return.

COHR

• 1D: 5.90%
• 1M: -4.63%
• YTD: 108.61%
• 6M: 115.90%
• 1Y: 375.64%
• 3Y*: 107.95%
• 5Y*: 40.59%
• 10Y*: 34.35%

ROBO

• 1D: 0.69%
• 1M: -4.88%
• YTD: 19.75%
• 6M: 18.31%
• 1Y: 44.60%
• 3Y*: 12.64%
• 5Y*: 5.51%
• 10Y*: 13.12%

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

COHR vs. ROBO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
COHR Coherent, Inc.	108.61%	94.84%	117.62%	24.02%	-48.63%	-10.04%	125.60%	3.73%	-30.86%	58.35%
ROBO ROBO Global Robotics & Automation Index ETF	19.75%	23.71%	-1.28%	23.74%	-33.92%	15.34%	45.26%	29.51%	-20.92%	44.26%

Correlation

The correlation between COHR and ROBO is 0.58, 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	0.58
Correlation (3Y) Calculated over the trailing 3-year period	0.61
Correlation (5Y) Calculated over the trailing 5-year period	0.66
Correlation (10Y) Calculated over the trailing 10-year period	0.64
Correlation (All Time) Calculated using the full available price history since Oct 22, 2013	0.61

The correlation between COHR and ROBO has been stable across timeframes, ranging from 0.58 to 0.66 - a consistent structural relationship.

Return for Risk

COHR vs. ROBO — Risk / Return Rank

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

COHR

COHR Risk / Return Rank: 97
COHR Sharpe Ratio Rank: 99
COHR Sortino Ratio Rank: 95
COHR Omega Ratio Rank: 95
COHR Calmar Ratio Rank: 99
COHR Martin Ratio Rank: 99

ROBO

ROBO Risk / Return Rank: 61
ROBO Sharpe Ratio Rank: 64
ROBO Sortino Ratio Rank: 60
ROBO Omega Ratio Rank: 59
ROBO Calmar Ratio Rank: 59
ROBO Martin Ratio Rank: 63

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.

COHR vs. ROBO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Coherent, Inc. (COHR) 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.

	COHR	ROBO	Difference
Sharpe ratio: Return per unit of total volatility	5.14	1.82	+3.31
Sortino ratio: Return per unit of downside risk	3.90	2.45	+1.45
Omega ratio: Gain probability vs. loss probability	1.54	1.31	+0.23
Calmar ratio: Return relative to maximum drawdown	14.28	2.58	+11.70
Martin ratio: Return relative to average drawdown	39.14	9.88	+29.27

COHR vs. ROBO - Sharpe Ratio Comparison

The current COHR Sharpe Ratio is 5.14, which is higher than the ROBO Sharpe Ratio of 1.82. The chart below compares the historical Sharpe Ratios of COHR 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

COHR vs. ROBO - Drawdown Comparison

The maximum COHR drawdown since its inception was -80.89%, which is greater than ROBO's maximum drawdown of -43.65%. Use the drawdown chart below to compare losses from any high point for COHR and ROBO.

Drawdown Indicators

	COHR	ROBO	Difference
Max Drawdown Largest peak-to-trough decline	-80.89%	-43.65%	-37.24%
Max Drawdown (1Y) Largest decline over 1 year	-26.52%	-17.35%	-9.17%
Max Drawdown (3Y) Largest decline over 3 years	-54.85%	-27.92%	-26.93%
Max Drawdown (5Y) Largest decline over 5 years	-62.87%	-43.65%	-19.22%
Max Drawdown (10Y) Largest decline over 10 years	-72.22%	-43.65%	-28.57%
Current Drawdown Current decline from peak	-9.81%	-8.12%	-1.69%
Average Drawdown Average peak-to-trough decline	-35.02%	-12.92%	-22.10%
Ulcer Index Depth and duration of drawdowns from previous peaks	9.66%	4.53%	+5.13%

Volatility

COHR vs. ROBO - Volatility Comparison

Coherent, Inc. (COHR) has a higher volatility of 27.87% compared to ROBO Global Robotics & Automation Index ETF (ROBO) at 10.66%. This indicates that COHR'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

	COHR	ROBO	Difference
Volatility (1M) Calculated over the trailing 1-month period	27.87%	10.66%	+17.21%
Volatility (6M) Calculated over the trailing 6-month period	57.45%	19.92%	+37.53%
Volatility (1Y) Calculated over the trailing 1-year period	73.72%	24.56%	+49.16%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	61.62%	23.92%	+37.70%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	56.55%	23.30%	+33.25%

Dividends

COHR vs. ROBO - Dividend Comparison

COHR has not paid dividends to shareholders, while ROBO's dividend yield for the trailing twelve months is around 0.35%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
COHR Coherent, Inc.	0.00%	0.00%	0.00%	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	0.35%	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 COHR and ROBO in my portfolio?

COHR and ROBO have a correlation of 0.58, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, COHR or ROBO?

COHR has higher volatility (27.87%) compared to ROBO (10.66%). In terms of maximum drawdown, COHR dropped -80.89% vs ROBO's -43.65%.

Which has better risk-adjusted returns?

COHR currently has the higher Sharpe Ratio (5.14 vs 1.82), 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.