RARE vs. BTU

Last updated Jun 23, 2026

RARE (Ultragenyx Pharmaceutical Inc.) and BTU (Peabody Energy Corporation) are both stocks. RARE operates in Biotechnology (Healthcare), while BTU operates in Thermal Coal (Energy). Over the past 5 years, RARE returned -20.90%/yr vs 25.81%/yr for BTU. At a 0.09 correlation, their price movements are largely independent.

Performance

RARE vs. BTU - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Ultragenyx Pharmaceutical Inc. (RARE) and Peabody Energy Corporation (BTU). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RARE achieves a 26.22% return, which is significantly higher than BTU's -18.35% return.

RARE

• 1D: 5.79%
• 1M: 24.11%
• YTD: 26.22%
• 6M: -16.46%
• 1Y: -21.84%
• 3Y*: -16.69%
• 5Y*: -20.90%
• 10Y*: -5.13%

BTU

• 1D: -2.74%
• 1M: -1.75%
• YTD: -18.35%
• 6M: -21.01%
• 1Y: 81.90%
• 3Y*: 6.70%
• 5Y*: 25.81%
• 10Y*: —

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

RARE vs. BTU - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RARE Ultragenyx Pharmaceutical Inc.	26.22%	-45.33%	-12.02%	3.22%	-44.90%	-39.25%	224.12%	-1.77%	-6.25%	-31.57%
BTU Peabody Energy Corporation	-18.35%	44.18%	-12.80%	-7.03%	162.36%	317.84%	-73.57%	-67.32%	-21.62%	31.10%

Correlation

The correlation between RARE and BTU is -0.04, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.04
Correlation (3Y) Calculated over the trailing 3-year period	0.02
Correlation (5Y) Calculated over the trailing 5-year period	0.04
Correlation (All Time) Calculated using the full available price history since Apr 3, 2017	0.09

The correlation between RARE and BTU shifts across timeframes, from -0.04 (1 year) to 0.09 (all time), reflecting how their relationship changes across market environments.

Fundamentals

EPS RARE : -$6.11 BTU : -$0.44
PS Ratio RARE : 4.32 BTU : 0.76
Total Revenue (TTM) RARE : $669.43M BTU : $3.86B
Gross Profit (TTM) RARE : $559.44M BTU : $318.50M
EBITDA (TTM) RARE : -$522.35M BTU : $401.20M

Return for Risk

RARE vs. BTU — Risk / Return Rank

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

RARE

RARE Risk / Return Rank: 31
RARE Sharpe Ratio Rank: 29
RARE Sortino Ratio Rank: 33
RARE Omega Ratio Rank: 34
RARE Calmar Ratio Rank: 29
RARE Martin Ratio Rank: 30

BTU

BTU Risk / Return Rank: 76
BTU Sharpe Ratio Rank: 80
BTU Sortino Ratio Rank: 77
BTU Omega Ratio Rank: 72
BTU Calmar Ratio Rank: 76
BTU Martin Ratio Rank: 74

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.

RARE vs. BTU - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Ultragenyx Pharmaceutical Inc. (RARE) and Peabody Energy Corporation (BTU). 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.

	RARE	BTU	Difference
Sharpe ratio: Return per unit of total volatility	-0.31	1.36	-1.67
Sortino ratio: Return per unit of downside risk	0.08	2.05	-1.96
Omega ratio: Gain probability vs. loss probability	1.01	1.23	-0.22
Calmar ratio: Return relative to maximum drawdown	-0.40	2.02	-2.42
Martin ratio: Return relative to average drawdown	-0.62	4.53	-5.16

RARE vs. BTU - Sharpe Ratio Comparison

The current RARE Sharpe Ratio is -0.31, which is lower than the BTU Sharpe Ratio of 1.36. The chart below compares the historical Sharpe Ratios of RARE and BTU, 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

RARE vs. BTU - Drawdown Comparison

The maximum RARE drawdown since its inception was -89.57%, smaller than the maximum BTU drawdown of -98.07%. Use the drawdown chart below to compare losses from any high point for RARE and BTU.

Drawdown Indicators

	RARE	BTU	Difference
Max Drawdown Largest peak-to-trough decline	-89.57%	-98.07%	+8.50%
Max Drawdown (1Y) Largest decline over 1 year	-55.36%	-40.67%	-14.69%
Max Drawdown (3Y) Largest decline over 3 years	-68.83%	-65.14%	-3.69%
Max Drawdown (5Y) Largest decline over 5 years	-81.93%	-67.44%	-14.49%
Max Drawdown (10Y) Largest decline over 10 years	-89.57%	—	—
Current Drawdown Current decline from peak	-83.63%	-41.58%	-42.05%
Average Drawdown Average peak-to-trough decline	-54.86%	-48.04%	-6.82%
Ulcer Index Depth and duration of drawdowns from previous peaks	35.00%	18.12%	+16.88%

Volatility

RARE vs. BTU - Volatility Comparison

The current volatility for Ultragenyx Pharmaceutical Inc. (RARE) is 16.92%, while Peabody Energy Corporation (BTU) has a volatility of 22.35%. This indicates that RARE experiences smaller price fluctuations and is considered to be less risky than BTU based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RARE	BTU	Difference
Volatility (1M) Calculated over the trailing 1-month period	16.92%	22.35%	-5.43%
Volatility (6M) Calculated over the trailing 6-month period	68.41%	42.09%	+26.32%
Volatility (1Y) Calculated over the trailing 1-year period	71.37%	60.65%	+10.72%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	54.28%	66.28%	-12.00%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	55.34%	77.73%	-22.39%

Dividends

RARE vs. BTU - Dividend Comparison

RARE has not paid dividends to shareholders, while BTU's dividend yield for the trailing twelve months is around 1.24%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018
BTU Peabody Energy Corporation	1.24%	1.01%	1.43%	0.93%	0.00%	0.00%	0.00%	26.43%	1.59%
RARE Ultragenyx Pharmaceutical Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Financials

Frequently Asked Questions

Can I hold both RARE and BTU in my portfolio?

RARE and BTU have a correlation of -0.04, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, RARE or BTU?

BTU has higher volatility (22.35%) compared to RARE (16.92%). In terms of maximum drawdown, RARE dropped -89.57% vs BTU's -98.07%.

Which has better risk-adjusted returns?

BTU currently has the higher Sharpe Ratio (1.36 vs -0.31), 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.