SNDK vs. CIEN

Last updated Jun 4, 2026

SNDK (Sandisk Corp) and CIEN (Ciena Corporation) are both stocks. Both are in the Technology sector — SNDK in Computer Hardware, CIEN in Communication Equipment. Over the past year, SNDK returned 4639.91% vs 645.10% for CIEN. At a 0.43 correlation, their price movements are largely independent.

Performance

SNDK vs. CIEN - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Sandisk Corp (SNDK) and Ciena Corporation (CIEN). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SNDK achieves a 671.55% return, which is significantly higher than CIEN's 165.26% return.

SNDK

• 1D: 6.71%
• 1M: 45.84%
• YTD: 671.55%
• 6M: 842.23%
• 1Y: 4,639.91%
• 3Y*: —
• 5Y*: —
• 10Y*: —

CIEN

• 1D: -1.06%
• 1M: 15.20%
• YTD: 165.26%
• 6M: 220.85%
• 1Y: 645.10%
• 3Y*: 134.47%
• 5Y*: 59.55%
• 10Y*: 40.28%

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

SNDK vs. CIEN - Yearly Performance Comparison

	2026 (YTD)	2025
SNDK Sandisk Corp	671.55%	388.44%
CIEN Ciena Corporation	165.26%	190.77%

Correlation

The correlation between SNDK and CIEN 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 25, 2025	0.43

Fundamentals

Market Cap SNDK : $287.55B CIEN : $90.45B
EPS SNDK : $29.70 CIEN : $1.58
PE Ratio SNDK : 61.67 CIEN : 393.42
PS Ratio SNDK : 21.08 CIEN : 17.59
PB Ratio SNDK : 20.87 CIEN : 32.39
Total Revenue (TTM) SNDK : $13.18B CIEN : $5.12B
Gross Profit (TTM) SNDK : $7.39B CIEN : $2.09B
EBITDA (TTM) SNDK : $5.37B CIEN : $450.47M

Return for Risk

SNDK vs. CIEN — Risk / Return Rank

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

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

CIEN

CIEN Risk / Return Rank: 99
CIEN Sharpe Ratio Rank: 100
CIEN Sortino Ratio Rank: 98
CIEN Omega Ratio Rank: 98
CIEN Calmar Ratio Rank: 100
CIEN 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.

SNDK vs. CIEN - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Sandisk Corp (SNDK) and Ciena Corporation (CIEN). 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.

	SNDK	CIEN	Difference
Sharpe ratio Return per unit of total volatility	48.18	9.97	+38.21
Sortino ratio Return per unit of downside risk	8.51	5.64	+2.87
Omega ratio Gain probability vs. loss probability	2.19	1.86	+0.33
Calmar ratio Return relative to maximum drawdown	150.40	38.67	+111.73
Martin ratio Return relative to average drawdown	460.18	113.44	+346.73
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SNDK vs. CIEN - Sharpe Ratio Comparison

The current SNDK Sharpe Ratio is 48.18, which is higher than the CIEN Sharpe Ratio of 9.97. The chart below compares the historical Sharpe Ratios of SNDK and CIEN, 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

	SNDK	CIEN	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	48.18	9.97	+38.21
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	1.25	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.92	—
Sharpe Ratio (All Time) Calculated using the full available price history	16.96	0.08	+16.88

Drawdowns

SNDK vs. CIEN - Drawdown Comparison

The maximum SNDK drawdown since its inception was -47.50%, smaller than the maximum CIEN drawdown of -99.51%. Use the drawdown chart below to compare losses from any high point for SNDK and CIEN.

Drawdown Indicators

	SNDK	CIEN	Difference
Max Drawdown Largest peak-to-trough decline	-47.50%	-99.51%	+52.01%
Max Drawdown (1Y) Largest decline over 1 year	-31.34%	-16.84%	-14.50%
Max Drawdown (3Y) Largest decline over 3 years	—	-45.51%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-49.54%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-49.54%	—
Current Drawdown Current decline from peak	0.00%	-40.72%	+40.72%
Average Drawdown Average peak-to-trough decline	-13.79%	-87.12%	+73.33%
Ulcer Index Depth and duration of drawdowns from previous peaks	10.22%	5.73%	+4.49%

Volatility

SNDK vs. CIEN - Volatility Comparison

Sandisk Corp (SNDK) has a higher volatility of 26.91% compared to Ciena Corporation (CIEN) at 19.50%. This indicates that SNDK's price experiences larger fluctuations and is considered to be riskier than CIEN based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SNDK	CIEN	Difference
Volatility (1M) Calculated over the trailing 1-month period	26.91%	19.50%	+7.41%
Volatility (6M) Calculated over the trailing 6-month period	70.59%	52.85%	+17.74%
Volatility (1Y) Calculated over the trailing 1-year period	97.85%	65.31%	+32.54%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	97.01%	47.89%	+49.12%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	97.01%	43.99%	+53.02%

Dividends

SNDK vs. CIEN - Dividend Comparison

Neither SNDK nor CIEN has paid dividends to shareholders.

Tickers have no history of dividend payments

Financials

SNDK vs. CIEN - Profitability Comparison

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

SNDK - Gross Margin

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

CIEN - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Ciena Corporation reported a gross profit of 625.52M and revenue of 1.43B. Therefore, the gross margin over that period was 43.8%.

SNDK - Operating Margin

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

CIEN - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Ciena Corporation reported an operating income of 189.41M and revenue of 1.43B, resulting in an operating margin of 13.3%.

SNDK - Net Margin

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

CIEN - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Ciena Corporation reported a net income of 150.28M and revenue of 1.43B, resulting in a net margin of 10.5%.

Frequently Asked Questions

Can I hold both SNDK and CIEN in my portfolio?

SNDK and CIEN 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, SNDK or CIEN?

SNDK has higher volatility (26.91%) compared to CIEN (19.50%). In terms of maximum drawdown, SNDK dropped -47.50% vs CIEN's -99.51%.

Which has better risk-adjusted returns?

SNDK currently has the higher Sharpe Ratio (48.18 vs 9.97), 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.