CSTL vs. USAR

Last updated Apr 1, 2026

Compare and contrast key facts about Castle Biosciences, Inc. (CSTL) and USA Rare Earth, Inc (USAR).

Performance

CSTL vs. USAR - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Castle Biosciences, Inc. (CSTL) and USA Rare Earth, Inc (USAR). The values are adjusted to include any dividend payments, if applicable.

CSTL vs. USAR - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
CSTL Castle Biosciences, Inc.	-36.89%	45.97%	23.49%	30.79%
USAR USA Rare Earth, Inc	27.18%	3.66%	11.13%	2.58%

Fundamentals

EPS CSTL : -$0.82 USAR : -$4.57
PS Ratio CSTL : 2.09 USAR : 3.14
Total Revenue (TTM) CSTL : $344.23M USAR : $314.13M
Gross Profit (TTM) CSTL : $204.51M USAR : $254.80M
EBITDA (TTM) CSTL : $8.22M USAR : -$50.51M

Returns By Period

In the year-to-date period, CSTL achieves a -36.89% return, which is significantly lower than USAR's 27.18% return.

CSTL

• 1D: 4.25%
• 1M: -16.98%
• YTD: -36.89%
• 6M: 7.82%
• 1Y: 22.63%
• 3Y*: 2.62%
• 5Y*: -19.15%
• 10Y*: —

USAR

• 1D: 6.36%
• 1M: -19.92%
• YTD: 27.18%
• 6M: -11.95%
• 1Y: 154.80%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

Return for Risk

CSTL vs. USAR — Risk / Return Rank

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

CSTL

CSTL Risk / Return Rank: 56
CSTL Sharpe Ratio Rank: 55
CSTL Sortino Ratio Rank: 58
CSTL Omega Ratio Rank: 55
CSTL Calmar Ratio Rank: 54
CSTL Martin Ratio Rank: 55

USAR

USAR Risk / Return Rank: 79
USAR Sharpe Ratio Rank: 78
USAR Sortino Ratio Rank: 85
USAR Omega Ratio Rank: 77
USAR Calmar Ratio Rank: 80
USAR Martin Ratio Rank: 73

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.

CSTL vs. USAR - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Castle Biosciences, Inc. (CSTL) and USA Rare Earth, Inc (USAR). 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.

	CSTL	USAR	Difference
Sharpe ratio Return per unit of total volatility	0.38	1.13	-0.75
Sortino ratio Return per unit of downside risk	1.09	2.35	-1.27
Omega ratio Gain probability vs. loss probability	1.13	1.25	-0.12
Calmar ratio Return relative to maximum drawdown	0.51	2.23	-1.72
Martin ratio Return relative to average drawdown	1.30	3.82	-2.52
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CSTL vs. USAR - Sharpe Ratio Comparison

The current CSTL Sharpe Ratio is 0.38, which is lower than the USAR Sharpe Ratio of 1.13. The chart below compares the historical Sharpe Ratios of CSTL and USAR, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	CSTL	USAR	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.38	1.13	-0.75
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.26	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.03	0.16	-0.13

Correlation

The correlation between CSTL and USAR is 0.08, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

CSTL vs. USAR - Dividend Comparison

Neither CSTL nor USAR has paid dividends to shareholders.

Tickers have no history of dividend payments

Drawdowns

CSTL vs. USAR - Drawdown Comparison

The maximum CSTL drawdown since its inception was -88.02%, which is greater than USAR's maximum drawdown of -69.23%. Use the drawdown chart below to compare losses from any high point for CSTL and USAR.

Drawdown Indicators

	CSTL	USAR	Difference
Max Drawdown Largest peak-to-trough decline	-88.02%	-69.23%	-18.79%
Max Drawdown (1Y) Largest decline over 1 year	-45.33%	-69.23%	+23.90%
Max Drawdown (5Y) Largest decline over 5 years	-84.97%	—	—
Current Drawdown Current decline from peak	-74.78%	-60.87%	-13.91%
Average Drawdown Average peak-to-trough decline	-54.08%	-17.18%	-36.90%
Ulcer Index Depth and duration of drawdowns from previous peaks	17.78%	40.38%	-22.60%

Volatility

CSTL vs. USAR - Volatility Comparison

The current volatility for Castle Biosciences, Inc. (CSTL) is 9.82%, while USA Rare Earth, Inc (USAR) has a volatility of 25.45%. This indicates that CSTL experiences smaller price fluctuations and is considered to be less risky than USAR based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CSTL	USAR	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.82%	25.45%	-15.63%
Volatility (6M) Calculated over the trailing 6-month period	36.73%	88.99%	-52.26%
Volatility (1Y) Calculated over the trailing 1-year period	59.76%	137.64%	-77.88%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	73.92%	104.05%	-30.13%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	74.42%	104.05%	-29.63%

Financials