CHAT vs. COHR

Last updated Jun 9, 2026

CHAT (Roundhill Generative AI & Technology ETF) is Technology Equities fund actively managed by Roundhill, while COHR (Coherent, Inc.) is a stock. Over the past 3 years, CHAT returned 50.33%/yr vs 117.79%/yr for COHR. A 0.69 correlation means they provide meaningful diversification when combined.

Performance

CHAT vs. COHR - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Roundhill Generative AI & Technology ETF (CHAT) and Coherent, Inc. (COHR). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CHAT achieves a 58.75% return, which is significantly lower than COHR's 117.77% return.

CHAT

• 1D: 3.25%
• 1M: 8.61%
• YTD: 58.75%
• 6M: 54.05%
• 1Y: 117.08%
• 3Y*: 50.33%
• 5Y*: —
• 10Y*: —

COHR

• 1D: 6.62%
• 1M: 19.89%
• YTD: 117.77%
• 6M: 116.25%
• 1Y: 404.05%
• 3Y*: 117.79%
• 5Y*: 41.61%
• 10Y*: 35.09%

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

CHAT vs. COHR - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
CHAT Roundhill Generative AI & Technology ETF	58.75%	49.85%	30.98%	19.23%
COHR Coherent, Inc.	117.77%	94.84%	117.62%	42.53%

Correlation

The correlation between CHAT and COHR is 0.65, 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	0.65
Correlation (3Y) Calculated over the trailing 3-year period	0.70
Correlation (All Time) Calculated using the full available price history since May 19, 2023	0.69

The correlation between CHAT and COHR has been stable across timeframes, ranging from 0.65 to 0.70 - a consistent structural relationship.

Return for Risk

CHAT vs. COHR — Risk / Return Rank

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

CHAT

CHAT Risk / Return Rank: 93
CHAT Sharpe Ratio Rank: 96
CHAT Sortino Ratio Rank: 90
CHAT Omega Ratio Rank: 91
CHAT Calmar Ratio Rank: 95
CHAT Martin Ratio Rank: 92

COHR

COHR Risk / Return Rank: 98
COHR Sharpe Ratio Rank: 99
COHR Sortino Ratio Rank: 96
COHR Omega Ratio Rank: 95
COHR Calmar Ratio Rank: 99
COHR Martin Ratio Rank: 99

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.

CHAT vs. COHR - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Roundhill Generative AI & Technology ETF (CHAT) and Coherent, Inc. (COHR). 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.

	CHAT	COHR	Difference
Sharpe ratio: Return per unit of total volatility	3.63	5.62	-1.98
Sortino ratio: Return per unit of downside risk	3.82	4.13	-0.31
Omega ratio: Gain probability vs. loss probability	1.54	1.58	-0.04
Calmar ratio: Return relative to maximum drawdown	7.23	15.36	-8.13
Martin ratio: Return relative to average drawdown	21.00	42.88	-21.88
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CHAT vs. COHR - Sharpe Ratio Comparison

The current CHAT Sharpe Ratio is 3.63, which is lower than the COHR Sharpe Ratio of 5.62. The chart below compares the historical Sharpe Ratios of CHAT and COHR, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	CHAT	COHR	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.63	5.62	-1.98
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.68	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.62	—
Sharpe Ratio (All Time) Calculated using the full available price history	1.78	0.33	+1.45

Drawdowns

CHAT vs. COHR - Drawdown Comparison

The maximum CHAT drawdown since its inception was -31.34%, smaller than the maximum COHR drawdown of -80.89%. Use the drawdown chart below to compare losses from any high point for CHAT and COHR.

Drawdown Indicators

	CHAT	COHR	Difference
Max Drawdown Largest peak-to-trough decline	-31.34%	-80.89%	+49.55%
Max Drawdown (1Y) Largest decline over 1 year	-16.28%	-26.52%	+10.24%
Max Drawdown (3Y) Largest decline over 3 years	-31.34%	-54.85%	+23.51%
Max Drawdown (5Y) Largest decline over 5 years	—	-62.87%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-72.22%	—
Current Drawdown Current decline from peak	-9.52%	-5.85%	-3.67%
Average Drawdown Average peak-to-trough decline	-5.36%	-35.03%	+29.67%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.60%	9.48%	-3.88%

Volatility

CHAT vs. COHR - Volatility Comparison

The current volatility for Roundhill Generative AI & Technology ETF (CHAT) is 15.95%, while Coherent, Inc. (COHR) has a volatility of 28.41%. This indicates that CHAT experiences smaller price fluctuations and is considered to be less risky than COHR based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CHAT	COHR	Difference
Volatility (1M) Calculated over the trailing 1-month period	15.95%	28.41%	-12.46%
Volatility (6M) Calculated over the trailing 6-month period	27.06%	55.90%	-28.84%
Volatility (1Y) Calculated over the trailing 1-year period	32.47%	72.65%	-40.18%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	30.45%	61.36%	-30.91%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	30.45%	56.43%	-25.98%

Dividends

CHAT vs. COHR - Dividend Comparison

CHAT's dividend yield for the trailing twelve months is around 1.80%, while COHR has not paid dividends to shareholders.

Position	TTM	2025
CHAT Roundhill Generative AI & Technology ETF	1.80%	2.85%
COHR Coherent, Inc.	0.00%	0.00%

Frequently Asked Questions

Can I hold both CHAT and COHR in my portfolio?

CHAT and COHR have a correlation of 0.65, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CHAT or COHR?

COHR has higher volatility (28.41%) compared to CHAT (15.95%). In terms of maximum drawdown, CHAT dropped -31.34% vs COHR's -80.89%.

Which has better risk-adjusted returns?

COHR currently has the higher Sharpe Ratio (5.62 vs 3.63), 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.