COHR vs. SNDK

Last updated Jun 13, 2026

COHR (Coherent, Inc.) and SNDK (Sandisk Corporation) are both stocks. Both are in the Technology sector — COHR in Scientific & Technical Instruments, SNDK in Computer Hardware. Over the past year, COHR returned 397.65% vs 4559.06% for SNDK. At a 0.43 correlation, their price movements are largely independent.

Performance

COHR vs. SNDK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Coherent, Inc. (COHR) and Sandisk Corporation (SNDK). 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 lower than SNDK's 734.15% return.

COHR

• 1D: 5.90%
• 1M: 0.67%
• YTD: 108.61%
• 6M: 115.90%
• 1Y: 397.65%
• 3Y*: 107.95%
• 5Y*: 40.59%
• 10Y*: 34.35%

SNDK

• 1D: 5.24%
• 1M: 40.67%
• YTD: 734.15%
• 6M: 860.37%
• 1Y: 4,559.06%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

COHR vs. SNDK - Yearly Performance Comparison

	2026 (YTD)	2025
COHR Coherent, Inc.	108.61%	123.34%
SNDK Sandisk Corporation	734.15%	356.50%

Correlation

The correlation between COHR and SNDK is 0.42, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.42
Correlation (All Time) Calculated using the full available price history since Feb 24, 2025	0.43

Fundamentals

EPS COHR : $1.64K SNDK : $29.70
PE Ratio COHR : 0.23 SNDK : 66.67
PS Ratio COHR : 0.02 SNDK : 22.79
Total Revenue (TTM) COHR : $1.81T SNDK : $13.18B
Gross Profit (TTM) COHR : $1.76B SNDK : $7.39B
EBITDA (TTM) COHR : $960.76M SNDK : $5.37B

Return for Risk

COHR vs. SNDK — 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

SNDK

SNDK Risk / Return Rank: 100
SNDK Sharpe Ratio Rank: 100
SNDK Sortino Ratio Rank: 99
SNDK Omega Ratio Rank: 99
SNDK Calmar Ratio Rank: 100
SNDK Martin Ratio Rank: 100

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. SNDK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Coherent, Inc. (COHR) and Sandisk Corporation (SNDK). 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	SNDK	Difference
Sharpe ratio: Return per unit of total volatility	5.14	47.94	-42.80
Sortino ratio: Return per unit of downside risk	3.90	8.36	-4.46
Omega ratio: Gain probability vs. loss probability	1.54	2.16	-0.62
Calmar ratio: Return relative to maximum drawdown	14.28	152.17	-137.90
Martin ratio: Return relative to average drawdown	39.14	461.00	-421.86

COHR vs. SNDK - Sharpe Ratio Comparison

The current COHR Sharpe Ratio is 5.14, which is lower than the SNDK Sharpe Ratio of 47.94. The chart below compares the historical Sharpe Ratios of COHR and SNDK, 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. SNDK - Drawdown Comparison

The maximum COHR drawdown since its inception was -80.89%, which is greater than SNDK's maximum drawdown of -47.50%. Use the drawdown chart below to compare losses from any high point for COHR and SNDK.

Drawdown Indicators

	COHR	SNDK	Difference
Max Drawdown Largest peak-to-trough decline	-80.89%	-47.50%	-33.39%
Max Drawdown (1Y) Largest decline over 1 year	-26.52%	-31.34%	+4.82%
Max Drawdown (3Y) Largest decline over 3 years	-54.85%	—	—
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	-9.81%	0.00%	-9.81%
Average Drawdown Average peak-to-trough decline	-35.02%	-13.74%	-21.28%
Ulcer Index Depth and duration of drawdowns from previous peaks	9.66%	10.32%	-0.66%

Volatility

COHR vs. SNDK - Volatility Comparison

Coherent, Inc. (COHR) and Sandisk Corporation (SNDK) have volatilities of 27.87% and 26.68%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	COHR	SNDK	Difference
Volatility (1M) Calculated over the trailing 1-month period	27.87%	26.68%	+1.19%
Volatility (6M) Calculated over the trailing 6-month period	57.45%	71.96%	-14.51%
Volatility (1Y) Calculated over the trailing 1-year period	73.72%	99.48%	-25.76%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	61.62%	97.64%	-36.02%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	56.55%	97.64%	-41.09%

Dividends

COHR vs. SNDK - Dividend Comparison

Neither COHR nor SNDK has paid dividends to shareholders.

Tickers have no history of dividend payments

Financials

COHR vs. SNDK - Profitability Comparison

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

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%.

SNDK - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Sandisk Corporation reported a gross profit of 4.66B and revenue of 5.95B. Therefore, the gross margin over that period was 78.4%.

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%.

SNDK - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Sandisk Corporation reported an operating income of 4.11B and revenue of 5.95B, resulting in an operating margin of 69.1%.

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%.

SNDK - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Sandisk Corporation reported a net income of 3.62B and revenue of 5.95B, resulting in a net margin of 60.8%.

Frequently Asked Questions

Can I hold both COHR and SNDK in my portfolio?

COHR and SNDK have a correlation of 0.42, 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 SNDK?

COHR has higher volatility (27.87%) compared to SNDK (26.68%). In terms of maximum drawdown, COHR dropped -80.89% vs SNDK's -47.50%.

Which has better risk-adjusted returns?

SNDK currently has the higher Sharpe Ratio (47.94 vs 5.14), 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.