CSTM vs. CENX

Last updated Jun 4, 2026

CSTM (Constellium SE) and CENX (Century Aluminum Company) are both stocks. Both operate in the Aluminum industry within the Basic Materials sector. Over the past 10 years, CSTM returned 22.30%/yr vs 25.77%/yr for CENX. At a 0.47 correlation, their price movements are largely independent.

Performance

CSTM vs. CENX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Constellium SE (CSTM) and Century Aluminum Company (CENX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CSTM achieves a 90.24% return, which is significantly higher than CENX's 71.09% return. Over the past 10 years, CSTM has underperformed CENX with an annualized return of 22.30%, while CENX has yielded a comparatively higher 25.77% annualized return.

CSTM

• 1D: -0.58%
• 1M: 16.28%
• YTD: 90.24%
• 6M: 99.44%
• 1Y: 182.81%
• 3Y*: 31.03%
• 5Y*: 14.93%
• 10Y*: 22.30%

CENX

• 1D: -2.52%
• 1M: 12.12%
• YTD: 71.09%
• 6M: 116.66%
• 1Y: 245.19%
• 3Y*: 98.04%
• 5Y*: 39.13%
• 10Y*: 25.77%

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

CSTM vs. CENX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
CSTM Constellium SE	90.24%	83.54%	-48.55%	68.72%	-33.95%	28.02%	4.40%	91.70%	-37.31%	88.98%
CENX Century Aluminum Company	71.09%	115.04%	50.08%	48.41%	-50.60%	50.14%	46.77%	2.80%	-62.78%	129.44%

Correlation

The correlation between CSTM and CENX is 0.39, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.39
Correlation (3Y) Calculated over the trailing 3-year period	0.47
Correlation (5Y) Calculated over the trailing 5-year period	0.51
Correlation (10Y) Calculated over the trailing 10-year period	0.51
Correlation (All Time) Calculated using the full available price history since May 24, 2013	0.47

The correlation between CSTM and CENX shifts across timeframes, from 0.39 (1 year) to 0.51 (5 years), reflecting how their relationship changes across market environments.

Fundamentals

EPS CSTM : $3.79 CENX : $3.54
PE Ratio CSTM : 9.47 CENX : 18.94
PEG Ratio CSTM : 0.12 CENX : 0.05
PS Ratio CSTM : 0.49 CENX : 2.60
Total Revenue (TTM) CSTM : $7.84B CENX : $2.54B
Gross Profit (TTM) CSTM : $447.08M CENX : $322.30M
EBITDA (TTM) CSTM : $612.70M CENX : $466.30M

Return for Risk

CSTM vs. CENX — Risk / Return Rank

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

CSTM

CSTM Risk / Return Rank: 96
CSTM Sharpe Ratio Rank: 97
CSTM Sortino Ratio Rank: 96
CSTM Omega Ratio Rank: 93
CSTM Calmar Ratio Rank: 98
CSTM Martin Ratio Rank: 98

CENX

CENX Risk / Return Rank: 96
CENX Sharpe Ratio Rank: 97
CENX Sortino Ratio Rank: 94
CENX Omega Ratio Rank: 92
CENX Calmar Ratio Rank: 97
CENX Martin Ratio Rank: 98

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.

CSTM vs. CENX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Constellium SE (CSTM) and Century Aluminum Company (CENX). 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.

	CSTM	CENX	Difference
Sharpe ratio Return per unit of total volatility	4.04	4.00	+0.04
Sortino ratio Return per unit of downside risk	4.41	3.82	+0.59
Omega ratio Gain probability vs. loss probability	1.51	1.49	+0.02
Calmar ratio Return relative to maximum drawdown	11.53	10.48	+1.05
Martin ratio Return relative to average drawdown	37.39	29.39	+8.00
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CSTM vs. CENX - Sharpe Ratio Comparison

The current CSTM Sharpe Ratio is 4.04, which is comparable to the CENX Sharpe Ratio of 4.00. The chart below compares the historical Sharpe Ratios of CSTM and CENX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	CSTM	CENX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	4.04	4.00	+0.04
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.32	0.55	-0.23
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.40	0.37	+0.03
Sharpe Ratio (All Time) Calculated using the full available price history	0.12	0.08	+0.04

Drawdowns

CSTM vs. CENX - Drawdown Comparison

The maximum CSTM drawdown since its inception was -88.70%, smaller than the maximum CENX drawdown of -98.67%. Use the drawdown chart below to compare losses from any high point for CSTM and CENX.

Drawdown Indicators

	CSTM	CENX	Difference
Max Drawdown Largest peak-to-trough decline	-88.70%	-98.67%	+9.97%
Max Drawdown (1Y) Largest decline over 1 year	-15.96%	-23.56%	+7.60%
Max Drawdown (3Y) Largest decline over 3 years	-66.35%	-42.77%	-23.58%
Max Drawdown (5Y) Largest decline over 5 years	-66.35%	-82.10%	+15.75%
Max Drawdown (10Y) Largest decline over 10 years	-72.30%	-87.51%	+15.21%
Current Drawdown Current decline from peak	-0.58%	-16.20%	+15.62%
Average Drawdown Average peak-to-trough decline	-53.85%	-61.16%	+7.31%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.91%	8.38%	-3.47%

Volatility

CSTM vs. CENX - Volatility Comparison

The current volatility for Constellium SE (CSTM) is 14.55%, while Century Aluminum Company (CENX) has a volatility of 19.18%. This indicates that CSTM experiences smaller price fluctuations and is considered to be less risky than CENX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CSTM	CENX	Difference
Volatility (1M) Calculated over the trailing 1-month period	14.55%	19.18%	-4.63%
Volatility (6M) Calculated over the trailing 6-month period	34.47%	44.48%	-10.01%
Volatility (1Y) Calculated over the trailing 1-year period	45.59%	61.76%	-16.17%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	46.68%	71.95%	-25.27%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	56.43%	70.58%	-14.15%

Dividends

CSTM vs. CENX - Dividend Comparison

Neither CSTM nor CENX has paid dividends to shareholders.

Tickers have no history of dividend payments

Financials

CSTM vs. CENX - Profitability Comparison

The chart below illustrates the profitability comparison between Constellium SE and Century Aluminum Company over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

CSTM - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Constellium SE reported a gross profit of 0.00 and revenue of 2.46B. Therefore, the gross margin over that period was 0.0%.

CENX - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Century Aluminum Company reported a gross profit of 118.80M and revenue of 649.20M. Therefore, the gross margin over that period was 18.3%.

CSTM - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Constellium SE reported an operating income of 0.00 and revenue of 2.46B, resulting in an operating margin of 0.0%.

CENX - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Century Aluminum Company reported an operating income of 374.00M and revenue of 649.20M, resulting in an operating margin of 57.6%.

CSTM - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Constellium SE reported a net income of 196.00M and revenue of 2.46B, resulting in a net margin of 8.0%.

CENX - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Century Aluminum Company reported a net income of 337.50M and revenue of 649.20M, resulting in a net margin of 52.0%.

Frequently Asked Questions

Can I hold both CSTM and CENX in my portfolio?

CSTM and CENX have a correlation of 0.39, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CSTM or CENX?

CENX has higher volatility (19.18%) compared to CSTM (14.55%). In terms of maximum drawdown, CSTM dropped -88.70% vs CENX's -98.67%.

Which has better risk-adjusted returns?

CSTM currently has the higher Sharpe Ratio (4.04 vs 4.00), 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.