ATO.PA vs. ^FCHI

Last updated Jul 21, 2026

ATO.PA (Atos SE) is a stock, while ^FCHI (CAC 40) is an index. Over the past 10 years, ATO.PA returned -39.11%/yr vs 6.77%/yr for ^FCHI. At a 0.48 correlation, their price movements are largely independent.

Performance

ATO.PA vs. ^FCHI - Performance Comparison

The chart below illustrates the hypothetical performance of a €10,000 investment in Atos SE (ATO.PA) and CAC 40 (^FCHI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ATO.PA achieves a -39.80% return, which is significantly lower than ^FCHI's 2.32% return. Over the past 10 years, ATO.PA has underperformed ^FCHI with an annualized return of -39.11%, while ^FCHI has yielded a comparatively higher 6.77% annualized return.

ATO.PA

• 1D: -0.13%
• 1M: -12.77%
• 6M: -44.97%
• YTD: -39.80%
• 1Y: 9.82%
• 3Y*: -69.53%
• 5Y*: -60.14%
• 10Y*: -39.11%
• ALL TIME*: -20.25%

^FCHI

• 1D: -0.47%
• 1M: -0.98%
• 6M: 2.80%
• YTD: 2.32%
• 1Y: 6.60%
• 3Y*: 4.44%
• 5Y*: 5.24%
• 10Y*: 6.77%
• ALL TIME*: 4.25%

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

ATO.PA vs. ^FCHI - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ATO.PA Atos SE	-39.80%	92.96%	-95.04%	-21.77%	-75.90%	-50.00%	0.62%	40.05%	-41.10%	21.05%
^FCHI CAC 40	2.32%	10.42%	-2.15%	16.52%	-9.50%	28.85%	-7.14%	26.37%	-10.95%	9.26%

Correlation

The correlation between ATO.PA and ^FCHI is 0.22, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.22
Correlation (3Y) Calculated over the trailing 3-year period	0.24
Correlation (5Y) Calculated over the trailing 5-year period	0.31
Correlation (10Y) Calculated over the trailing 10-year period	0.40
Correlation (All Time) Calculated using the full available price history since Jan 3, 2007	0.48

Over the past year, the correlation between ATO.PA and ^FCHI has dropped to 0.22 - well below their long-term average of 0.48, suggesting their price drivers have been diverging.

Return for Risk

ATO.PA vs. ^FCHI — Risk / Return Rank

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

ATO.PA

ATO.PA Risk / Return Rank: 51
ATO.PA Sharpe Ratio Rank: 52
ATO.PA Sortino Ratio Rank: 52
ATO.PA Omega Ratio Rank: 50
ATO.PA Calmar Ratio Rank: 51
ATO.PA Martin Ratio Rank: 50

^FCHI

^FCHI Risk / Return Rank: 21
^FCHI Sharpe Ratio Rank: 23
^FCHI Sortino Ratio Rank: 19
^FCHI Omega Ratio Rank: 19
^FCHI Calmar Ratio Rank: 22
^FCHI Martin Ratio Rank: 24

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.

ATO.PA vs. ^FCHI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Atos SE (ATO.PA) and CAC 40 (^FCHI). 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.

	ATO.PA	^FCHI	Difference
Sharpe ratio: Return per unit of total volatility	0.16	0.46	-0.30
Sortino ratio: Return per unit of downside risk	0.71	0.76	-0.05
Omega ratio: Gain probability vs. loss probability	1.08	1.09	-0.02
Calmar ratio: Return relative to maximum drawdown	0.19	0.59	-0.40
Martin ratio: Return relative to average drawdown	0.34	1.69	-1.35

ATO.PA vs. ^FCHI - Sharpe Ratio Comparison

The current ATO.PA Sharpe Ratio is 0.16, which is lower than the ^FCHI Sharpe Ratio of 0.46. The chart below compares the historical Sharpe Ratios of ATO.PA and ^FCHI, 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

ATO.PA vs. ^FCHI - Drawdown Comparison

The maximum ATO.PA drawdown since its inception was -99.84%, which is greater than ^FCHI's maximum drawdown of -65.29%. Use the drawdown chart below to compare losses from any high point for ATO.PA and ^FCHI.

Drawdown Indicators

	ATO.PA	^FCHI	Difference
Max Drawdown Largest peak-to-trough decline	-99.84%	-65.29%	-34.55%
Max Drawdown (1Y) Largest decline over 1 year	-50.53%	-11.08%	-39.45%
Max Drawdown (3Y) Largest decline over 3 years	-98.93%	-16.71%	-82.22%
Max Drawdown (5Y) Largest decline over 5 years	-99.67%	-23.04%	-76.63%
Max Drawdown (10Y) Largest decline over 10 years	-99.84%	-38.56%	-61.28%
Current Drawdown Current decline from peak	-99.59%	-3.27%	-96.32%
Average Drawdown Average peak-to-trough decline	-39.94%	-24.39%	-15.55%
Ulcer Index Depth and duration of drawdowns from previous peaks	29.10%	3.89%	+25.21%

Volatility

ATO.PA vs. ^FCHI - Volatility Comparison

Atos SE (ATO.PA) has a higher volatility of 8.40% compared to CAC 40 (^FCHI) at 3.51%. This indicates that ATO.PA's price experiences larger fluctuations and is considered to be riskier than ^FCHI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ATO.PA	^FCHI	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.40%	3.51%	+4.89%
Volatility (6M) Calculated over the trailing 6-month period	38.63%	11.50%	+27.13%
Volatility (1Y) Calculated over the trailing 1-year period	60.06%	14.23%	+45.83%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	126.34%	16.40%	+109.94%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	92.37%	17.39%	+74.98%

Frequently Asked Questions

Can I hold both ATO.PA and ^FCHI in my portfolio?

ATO.PA and ^FCHI have a correlation of 0.22, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.