RKLB vs. SNDK

Last updated Jun 30, 2026

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

Performance

RKLB vs. SNDK - Performance Comparison

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

Returns By Period

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

RKLB

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

SNDK

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

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

RKLB vs. SNDK - Yearly Performance Comparison

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

Correlation

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

Return for Risk

RKLB vs. SNDK — Risk / Return Rank

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

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

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.

RKLB vs. SNDK - Risk-Adjusted Trends Comparison

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

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

RKLB vs. SNDK - Sharpe Ratio Comparison

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

RKLB vs. SNDK - Drawdown Comparison

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

Drawdown Indicators

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

Volatility

RKLB vs. SNDK - Volatility Comparison

The current volatility for Rocket Lab USA, Inc. (RKLB) is 34.18%, while Sandisk Corporation (SNDK) has a volatility of 38.34%. This indicates that RKLB experiences smaller price fluctuations and is considered to be less risky than SNDK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

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

Dividends

RKLB vs. SNDK - Dividend Comparison

Neither RKLB nor SNDK has paid dividends to shareholders.

Tickers have no history of dividend payments

Financials

RKLB vs. SNDK - Profitability Comparison

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

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 - 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 - 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 - 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 - 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%.

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 RKLB and SNDK in my portfolio?

RKLB and SNDK 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, RKLB or SNDK?

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

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.