TER vs. COHR

Last updated Jun 9, 2026

TER (Teradyne, Inc.) and COHR (Coherent, Inc.) are both stocks. Both are in the Technology sector — TER in Semiconductor Equipment & Materials, COHR in Scientific & Technical Instruments. Over the past 10 years, TER returned 34.87%/yr vs 35.09%/yr for COHR. At a 0.34 correlation, their price movements are largely independent.

Performance

TER vs. COHR - Performance Comparison

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

Returns By Period

In the year-to-date period, TER achieves a 93.73% return, which is significantly lower than COHR's 117.77% return. Both investments have delivered pretty close results over the past 10 years, with TER having a 34.87% annualized return and COHR not far ahead at 35.09%.

TER

• 1D: 4.68%
• 1M: 4.19%
• YTD: 93.73%
• 6M: 84.73%
• 1Y: 340.75%
• 3Y*: 53.39%
• 5Y*: 25.10%
• 10Y*: 34.87%

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)

TER vs. COHR - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TER Teradyne, Inc.	93.73%	54.39%	16.51%	24.78%	-46.35%	36.81%	76.73%	118.93%	-24.37%	66.16%
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 TER and COHR is 0.57, 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	0.57
Correlation (3Y) Calculated over the trailing 3-year period	0.61
Correlation (5Y) Calculated over the trailing 5-year period	0.64
Correlation (10Y) Calculated over the trailing 10-year period	0.60
Correlation (All Time) Calculated using the full available price history since Mar 27, 1990	0.34

Over the past year, TER and COHR have become more correlated (0.57) than their long-term average of 0.34, meaning their price movements have been converging.

Fundamentals

EPS TER : $5.38 COHR : $1.64K
PE Ratio TER : 69.70 COHR : 0.24
PS Ratio TER : 15.72 COHR : 0.03
Total Revenue (TTM) TER : $3.79B COHR : $1.81T
Gross Profit (TTM) TER : $2.23B COHR : $1.76B
EBITDA (TTM) TER : $1.11B COHR : $960.76M

Return for Risk

TER vs. COHR — Risk / Return Rank

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

TER

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

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.

TER vs. COHR - Risk-Adjusted Trends Comparison

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

	TER	COHR	Difference
Sharpe ratio: Return per unit of total volatility	5.19	5.62	-0.42
Sortino ratio: Return per unit of downside risk	4.36	4.13	+0.23
Omega ratio: Gain probability vs. loss probability	1.63	1.58	+0.05
Calmar ratio: Return relative to maximum drawdown	12.85	15.36	-2.51
Martin ratio: Return relative to average drawdown	46.52	42.88	+3.64
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

TER vs. COHR - Sharpe Ratio Comparison

The current TER Sharpe Ratio is 5.19, which is comparable to the COHR Sharpe Ratio of 5.62. The chart below compares the historical Sharpe Ratios of TER 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

	TER	COHR	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	5.19	5.62	-0.42
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.51	0.68	-0.18
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.78	0.62	+0.15
Sharpe Ratio (All Time) Calculated using the full available price history	0.22	0.33	-0.11

Drawdowns

TER vs. COHR - Drawdown Comparison

The maximum TER drawdown since its inception was -97.30%, which is greater than COHR's maximum drawdown of -80.89%. Use the drawdown chart below to compare losses from any high point for TER and COHR.

Drawdown Indicators

	TER	COHR	Difference
Max Drawdown Largest peak-to-trough decline	-97.30%	-80.89%	-16.41%
Max Drawdown (1Y) Largest decline over 1 year	-26.73%	-26.52%	-0.21%
Max Drawdown (3Y) Largest decline over 3 years	-58.18%	-54.85%	-3.33%
Max Drawdown (5Y) Largest decline over 5 years	-59.12%	-62.87%	+3.75%
Max Drawdown (10Y) Largest decline over 10 years	-59.12%	-72.22%	+13.10%
Current Drawdown Current decline from peak	-10.34%	-5.85%	-4.49%
Average Drawdown Average peak-to-trough decline	-58.69%	-35.03%	-23.66%
Ulcer Index Depth and duration of drawdowns from previous peaks	7.37%	9.48%	-2.11%

Volatility

TER vs. COHR - Volatility Comparison

The current volatility for Teradyne, Inc. (TER) is 21.89%, while Coherent, Inc. (COHR) has a volatility of 28.41%. This indicates that TER 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

	TER	COHR	Difference
Volatility (1M) Calculated over the trailing 1-month period	21.89%	28.41%	-6.52%
Volatility (6M) Calculated over the trailing 6-month period	51.74%	55.90%	-4.16%
Volatility (1Y) Calculated over the trailing 1-year period	66.25%	72.65%	-6.40%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	49.92%	61.36%	-11.44%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	45.15%	56.43%	-11.28%

Dividends

TER vs. COHR - Dividend Comparison

TER's dividend yield for the trailing twelve months is around 0.13%, while COHR has not paid dividends to shareholders.

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%
TER Teradyne, Inc.	0.13%	0.25%	0.38%	0.41%	0.50%	0.24%	0.33%	0.53%	1.15%	0.67%	0.94%	1.16%

Financials

TER vs. COHR - Profitability Comparison

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

TER - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Teradyne, Inc. reported a gross profit of 780.95M and revenue of 1.28B. Therefore, the gross margin over that period was 60.9%.

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%.

TER - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Teradyne, Inc. reported an operating income of 473.00M and revenue of 1.28B, resulting in an operating margin of 36.9%.

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%.

TER - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Teradyne, Inc. reported a net income of 398.91M and revenue of 1.28B, resulting in a net margin of 31.1%.

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 TER and COHR in my portfolio?

TER and COHR have a correlation of 0.57, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, TER or COHR?

COHR has higher volatility (28.41%) compared to TER (21.89%). In terms of maximum drawdown, TER dropped -97.30% vs COHR's -80.89%.

Which has better risk-adjusted returns?

COHR currently has the higher Sharpe Ratio (5.62 vs 5.19), 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.