FLY vs. RKLB

Last updated Aug 1, 2026

FLY (Firefly Aerospace Inc) and RKLB (Rocket Lab USA, Inc.) are both stocks. Both operate in the Aerospace & Defense industry within the Industrials sector. Their 0.67 correlation means they have sometimes moved together and sometimes differently.

Performance

FLY vs. RKLB - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Firefly Aerospace Inc (FLY) 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, FLY achieves a -9.12% return, which is significantly lower than RKLB's -6.90% return.

FLY

• 1D: 0.20%
• 1M: -29.65%
• 6M: -19.33%
• YTD: -9.12%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: —

RKLB

• 1D: 0.42%
• 1M: -35.35%
• 6M: -18.88%
• YTD: -6.90%
• 1Y: 44.95%
• 3Y*: 107.59%
• 5Y*: —
• 10Y*: —
• ALL TIME*: 42.54%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
FLY Firefly Aerospace Inc	$64.26M	$73.54M	$244.72M
RKLB Rocket Lab USA, Inc.	$1.17B	$1.42B	$2.73B

FLY vs. RKLB - Yearly Performance Comparison

	2026 (YTD)	2025
FLY Firefly Aerospace Inc	-9.12%	-68.04%
RKLB Rocket Lab USA, Inc.	-6.90%	58.19%

Correlation

The correlation between FLY and RKLB is 0.67, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.

	Correlation
Correlation (All Time) Calculated using the full available price history since Aug 7, 2025	0.67

Fundamentals

Market Cap FLY : $3.34B RKLB : $37.60B
EPS FLY : -$2.17 RKLB : -$0.32
PS Ratio FLY : 16.99 RKLB : 54.37
PB Ratio FLY : 2.94 RKLB : 17.37
Total Revenue (TTM) FLY : $184.88M RKLB : $679.58M
Gross Profit (TTM) FLY : $40.11M RKLB : $248.43M
EBITDA (TTM) FLY : -$266.77M RKLB : -$177.36M

Return for Risk

FLY vs. RKLB — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

FLY

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

RKLB

RKLB Risk / Return Rank: 62
RKLB Sharpe Ratio Rank: 61
RKLB Sortino Ratio Rank: 66
RKLB Omega Ratio Rank: 62
RKLB Calmar Ratio Rank: 61
RKLB Martin Ratio Rank: 62

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

FLY vs. RKLB - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Firefly Aerospace Inc (FLY) 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.

	FLY	RKLB	Difference
Sharpe ratio: Return per unit of total volatility	—	0.44	—
Sortino ratio: Return per unit of downside risk	—	1.28	—
Omega ratio: Gain probability vs. loss probability	—	1.15	—
Calmar ratio: Return relative to maximum drawdown	—	0.68	—
Martin ratio: Return relative to average drawdown	—	1.68	—

Drawdowns

FLY vs. RKLB - Drawdown Comparison

The maximum FLY drawdown since its inception was -76.03%, smaller than the maximum RKLB drawdown of -82.96%. Use the drawdown chart below to compare losses from any high point for FLY and RKLB.

Drawdown Indicators

	FLY	RKLB	Difference
Max Drawdown Largest peak-to-trough decline	-76.03%	-82.96%	+6.93%
Max Drawdown (1Y) Largest decline over 1 year	—	-60.99%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-60.99%	—
Current Drawdown Current decline from peak	-70.96%	-56.77%	-14.19%
Average Drawdown Average peak-to-trough decline	-56.73%	-51.12%	-5.61%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	24.74%	—

Volatility

Volatility by Period

	FLY	RKLB	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	25.66%	—
Volatility (6M) Calculated over the trailing 6-month period	—	73.51%	—
Volatility (1Y) Calculated over the trailing 1-year period	113.12%	95.44%	+17.68%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	113.12%	82.12%	+31.00%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	113.12%	82.12%	+31.00%

Dividends

FLY vs. RKLB - Dividend Comparison

Neither FLY nor RKLB has paid dividends to shareholders.

Tickers have no history of dividend payments

Financials

Frequently Asked Questions

Can I hold both FLY and RKLB in my portfolio?

FLY and RKLB have a correlation of 0.67, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.