AA vs. COHR

Last updated Jun 9, 2026

AA (Alcoa Corporation) and COHR (Coherent, Inc.) are both stocks. AA operates in Aluminum (Basic Materials), while COHR operates in Scientific & Technical Instruments (Technology). Over the past 5 years, AA returned 15.22%/yr vs 41.61%/yr for COHR. At a 0.37 correlation, their price movements are largely independent.

Performance

AA vs. COHR - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Alcoa Corporation (AA) and Coherent, Inc. (COHR). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AA achieves a 38.65% return, which is significantly lower than COHR's 117.77% return.

AA

• 1D: 2.16%
• 1M: 16.43%
• YTD: 38.65%
• 6M: 65.72%
• 1Y: 164.65%
• 3Y*: 29.24%
• 5Y*: 15.22%
• 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)

AA vs. COHR - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AA Alcoa Corporation	38.65%	42.46%	12.43%	-24.33%	-23.12%	159.05%	7.16%	-19.07%	-50.66%	91.84%
COHR Coherent, Inc.	117.77%	94.84%	117.62%	24.02%	-48.63%	-10.04%	125.60%	3.73%	-30.86%	58.35%

Correlation

The correlation between AA and COHR is 0.41, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.41
Correlation (3Y) Calculated over the trailing 3-year period	0.41
Correlation (5Y) Calculated over the trailing 5-year period	0.41
Correlation (All Time) Calculated using the full available price history since Nov 2, 2016	0.37

Fundamentals

EPS AA : $3.92 COHR : $1.64K
PE Ratio AA : 18.74 COHR : 0.24
PEG Ratio AA : 0.05 COHR : 0.04
PS Ratio AA : 1.52 COHR : 0.03
Total Revenue (TTM) AA : $12.66B COHR : $1.81T
Gross Profit (TTM) AA : $948.00M COHR : $1.76B
EBITDA (TTM) AA : $1.70B COHR : $960.76M

Return for Risk

AA vs. COHR — Risk / Return Rank

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

AA

AA Risk / Return Rank: 95
AA Sharpe Ratio Rank: 96
AA Sortino Ratio Rank: 92
AA Omega Ratio Rank: 90
AA Calmar Ratio Rank: 98
AA Martin Ratio Rank: 97

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.

AA vs. COHR - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Alcoa Corporation (AA) 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.

	AA	COHR	Difference
Sharpe ratio: Return per unit of total volatility	3.11	5.62	-2.51
Sortino ratio: Return per unit of downside risk	3.46	4.13	-0.67
Omega ratio: Gain probability vs. loss probability	1.41	1.58	-0.17
Calmar ratio: Return relative to maximum drawdown	10.49	15.36	-4.87
Martin ratio: Return relative to average drawdown	25.51	42.88	-17.37
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AA vs. COHR - Sharpe Ratio Comparison

The current AA Sharpe Ratio is 3.11, which is lower than the COHR Sharpe Ratio of 5.62. The chart below compares the historical Sharpe Ratios of AA 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

	AA	COHR	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.11	5.62	-2.51
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.27	0.68	-0.41
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.62	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.24	0.33	-0.08

Drawdowns

AA vs. COHR - Drawdown Comparison

The maximum AA drawdown since its inception was -90.90%, which is greater than COHR's maximum drawdown of -80.89%. Use the drawdown chart below to compare losses from any high point for AA and COHR.

Drawdown Indicators

	AA	COHR	Difference
Max Drawdown Largest peak-to-trough decline	-90.90%	-80.89%	-10.01%
Max Drawdown (1Y) Largest decline over 1 year	-15.80%	-26.52%	+10.72%
Max Drawdown (3Y) Largest decline over 3 years	-52.25%	-54.85%	+2.60%
Max Drawdown (5Y) Largest decline over 5 years	-75.46%	-62.87%	-12.59%
Max Drawdown (10Y) Largest decline over 10 years	—	-72.22%	—
Current Drawdown Current decline from peak	-19.12%	-5.85%	-13.27%
Average Drawdown Average peak-to-trough decline	-46.18%	-35.03%	-11.15%
Ulcer Index Depth and duration of drawdowns from previous peaks	6.48%	9.48%	-3.00%

Volatility

AA vs. COHR - Volatility Comparison

The current volatility for Alcoa Corporation (AA) is 18.33%, while Coherent, Inc. (COHR) has a volatility of 28.41%. This indicates that AA 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

	AA	COHR	Difference
Volatility (1M) Calculated over the trailing 1-month period	18.33%	28.41%	-10.08%
Volatility (6M) Calculated over the trailing 6-month period	39.63%	55.90%	-16.27%
Volatility (1Y) Calculated over the trailing 1-year period	53.40%	72.65%	-19.25%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	56.08%	61.36%	-5.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	55.59%	56.43%	-0.84%

Dividends

AA vs. COHR - Dividend Comparison

AA's dividend yield for the trailing twelve months is around 0.54%, while COHR has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
AA Alcoa Corporation	0.54%	0.75%	1.06%	1.18%	0.88%	0.17%	0.00%	0.00%	0.00%	0.00%	0.32%
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%

Financials

AA vs. COHR - Profitability Comparison

The chart below illustrates the profitability comparison between Alcoa Corporation and Coherent, Inc. over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

AA - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Alcoa Corporation reported a gross profit of 0.00 and revenue of 3.19B. Therefore, the gross margin over that period was 0.0%.

COHR - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Coherent, Inc. reported a gross profit of 0.00 and revenue of 1.81T. Therefore, the gross margin over that period was 0.0%.

AA - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Alcoa Corporation reported an operating income of 0.00 and revenue of 3.19B, resulting in an operating margin of 0.0%.

COHR - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Coherent, Inc. reported an operating income of 0.00 and revenue of 1.81T, resulting in an operating margin of 0.0%.

AA - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Alcoa Corporation reported a net income of 425.00M and revenue of 3.19B, resulting in a net margin of 13.3%.

COHR - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Coherent, Inc. reported a net income of 191.40B and revenue of 1.81T, resulting in a net margin of 10.6%.

Frequently Asked Questions

Can I hold both AA and COHR in my portfolio?

AA and COHR have a correlation of 0.41, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, AA or COHR?

COHR has higher volatility (28.41%) compared to AA (18.33%). In terms of maximum drawdown, AA dropped -90.90% vs COHR's -80.89%.

Which has better risk-adjusted returns?

COHR currently has the higher Sharpe Ratio (5.62 vs 3.11), 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.