SNDK vs. RKLB

Last updated Jun 30, 2026

SNDK (Sandisk Corporation) and RKLB (Rocket Lab USA, Inc.) are both stocks. SNDK operates in Computer Hardware (Technology), while RKLB operates in Aerospace & Defense (Industrials). Over the past year, SNDK returned 4248.65% vs 177.02% for RKLB. At a 0.22 correlation, their price movements are largely independent.

Performance

SNDK vs. RKLB - Performance Comparison

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

Returns By Period

In the year-to-date period, SNDK achieves a 763.76% return, which is significantly higher than RKLB's 40.50% return.

SNDK

• 1D: -1.93%
• 1M: 20.97%
• YTD: 763.76%
• 6M: 739.46%
• 1Y: 4,248.65%
• 3Y*: —
• 5Y*: —
• 10Y*: —

RKLB

• 1D: 15.93%
• 1M: -31.69%
• YTD: 40.50%
• 6M: 39.77%
• 1Y: 177.02%
• 3Y*: 153.73%
• 5Y*: —
• 10Y*: —

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

SNDK vs. RKLB - Yearly Performance Comparison

	2026 (YTD)	2025
SNDK Sandisk Corporation	763.76%	356.50%
RKLB Rocket Lab USA, Inc.	40.50%	196.22%

Correlation

The correlation between SNDK and RKLB is 0.21, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.21
Correlation (All Time) Calculated using the full available price history since Feb 24, 2025	0.22

Fundamentals

Market Cap SNDK : $321.91B RKLB : $59.34B
EPS SNDK : $29.27 RKLB : -$0.32
PS Ratio SNDK : 23.95 RKLB : 82.05
PB Ratio SNDK : 23.37 RKLB : 26.21
Total Revenue (TTM) SNDK : $13.18B RKLB : $679.58M
Gross Profit (TTM) SNDK : $7.39B RKLB : $248.43M
EBITDA (TTM) SNDK : $5.37B RKLB : -$177.36M

Return for Risk

SNDK vs. RKLB — 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

RKLB

RKLB Risk / Return Rank: 86
RKLB Sharpe Ratio Rank: 89
RKLB Sortino Ratio Rank: 85
RKLB Omega Ratio Rank: 82
RKLB Calmar Ratio Rank: 89
RKLB Martin Ratio Rank: 87

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. RKLB - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Sandisk Corporation (SNDK) and Rocket Lab USA, Inc. (RKLB). 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.

	SNDK	RKLB	Difference
Sharpe ratio: Return per unit of total volatility	41.38	1.89	+39.49
Sortino ratio: Return per unit of downside risk	7.79	2.49	+5.31
Omega ratio: Gain probability vs. loss probability	2.05	1.30	+0.76
Calmar ratio: Return relative to maximum drawdown	137.67	3.85	+133.82
Martin ratio: Return relative to average drawdown	415.33	8.86	+406.47

SNDK vs. RKLB - Sharpe Ratio Comparison

The current SNDK Sharpe Ratio is 41.38, which is higher than the RKLB Sharpe Ratio of 1.89. The chart below compares the historical Sharpe Ratios of SNDK and RKLB, 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

SNDK vs. RKLB - Drawdown Comparison

The maximum SNDK drawdown since its inception was -47.50%, smaller than the maximum RKLB drawdown of -82.96%. Use the drawdown chart below to compare losses from any high point for SNDK and RKLB.

Drawdown Indicators

	SNDK	RKLB	Difference
Max Drawdown Largest peak-to-trough decline	-47.50%	-82.96%	+35.46%
Max Drawdown (1Y) Largest decline over 1 year	-31.34%	-46.29%	+14.95%
Max Drawdown (3Y) Largest decline over 3 years	—	-55.49%	—
Current Drawdown Current decline from peak	-12.19%	-34.76%	+22.57%
Average Drawdown Average peak-to-trough decline	-13.53%	-51.15%	+37.62%
Ulcer Index Depth and duration of drawdowns from previous peaks	10.41%	20.06%	-9.65%

Volatility

SNDK vs. RKLB - Volatility Comparison

Sandisk Corporation (SNDK) has a higher volatility of 38.34% compared to Rocket Lab USA, Inc. (RKLB) at 34.18%. This indicates that SNDK's price experiences larger fluctuations and is considered to be riskier than RKLB based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SNDK	RKLB	Difference
Volatility (1M) Calculated over the trailing 1-month period	38.34%	34.18%	+4.16%
Volatility (6M) Calculated over the trailing 6-month period	75.86%	72.52%	+3.34%
Volatility (1Y) Calculated over the trailing 1-year period	104.47%	94.35%	+10.12%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	100.03%	81.99%	+18.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	100.03%	81.99%	+18.04%

Dividends

SNDK vs. RKLB - Dividend Comparison

Neither SNDK nor RKLB has paid dividends to shareholders.

Tickers have no history of dividend payments

Financials

SNDK vs. RKLB - Profitability Comparison

The chart below illustrates the profitability comparison between Sandisk Corporation and Rocket Lab USA, Inc. 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 Corporation reported a gross profit of 4.66B and revenue of 5.95B. Therefore, the gross margin over that period was 78.4%.

RKLB - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Rocket Lab USA, Inc. reported a gross profit of 76.49M and revenue of 200.35M. Therefore, the gross margin over that period was 38.2%.

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%.

RKLB - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Rocket Lab USA, Inc. reported an operating income of -55.97M and revenue of 200.35M, resulting in an operating margin of -27.9%.

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%.

RKLB - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Rocket Lab USA, Inc. reported a net income of -45.02M and revenue of 200.35M, resulting in a net margin of -22.5%.

Frequently Asked Questions

Can I hold both SNDK and RKLB in my portfolio?

SNDK and RKLB have a correlation of 0.21, 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 RKLB?

SNDK has higher volatility (38.34%) compared to RKLB (34.18%). In terms of maximum drawdown, SNDK dropped -47.50% vs RKLB's -82.96%.

Which has better risk-adjusted returns?

SNDK currently has the higher Sharpe Ratio (41.38 vs 1.89), 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.