FCAUX vs. FXAIX

Last updated Jun 4, 2026

FCAUX (Fidelity Climate Action Fund) and FXAIX (Fidelity 500 Index Fund) are both mutual funds - FCAUX is a Global Equities fund managed by Fidelity, while FXAIX is a S&P 500 fund tracking the S&P 500 Index. Over the past 3 years, FCAUX returned 24.50%/yr vs 22.75%/yr for FXAIX. Their correlation of 0.94 suggests significant overlap in exposure. FCAUX charges 1.04%/yr vs 0.02%/yr for FXAIX.

Performance

FCAUX vs. FXAIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Climate Action Fund (FCAUX) and Fidelity 500 Index Fund (FXAIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FCAUX achieves a 18.35% return, which is significantly higher than FXAIX's 11.71% return.

FCAUX

• 1D: 0.69%
• 1M: 7.31%
• YTD: 18.35%
• 6M: 18.43%
• 1Y: 43.17%
• 3Y*: 24.50%
• 5Y*: —
• 10Y*: —

FXAIX

• 1D: 0.13%
• 1M: 5.80%
• YTD: 11.71%
• 6M: 11.74%
• 1Y: 28.99%
• 3Y*: 22.75%
• 5Y*: 14.28%
• 10Y*: 15.66%

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

FCAUX vs. FXAIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
FCAUX Fidelity Climate Action Fund	18.35%	21.27%	24.06%	19.06%	-25.29%	11.40%
FXAIX Fidelity 500 Index Fund	11.71%	17.84%	25.01%	26.29%	-18.14%	13.06%

Correlation

The correlation between FCAUX and FXAIX is 0.93, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.93
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (All Time) Calculated using the full available price history since Jun 16, 2021	0.94

The correlation between FCAUX and FXAIX has been stable across timeframes, ranging from 0.93 to 0.94 - a consistent structural relationship.

Return for Risk

FCAUX vs. FXAIX — Risk / Return Rank

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

FCAUX

FCAUX Risk / Return Rank: 85
FCAUX Sharpe Ratio Rank: 88
FCAUX Sortino Ratio Rank: 81
FCAUX Omega Ratio Rank: 76
FCAUX Calmar Ratio Rank: 87
FCAUX Martin Ratio Rank: 92

FXAIX

FXAIX Risk / Return Rank: 73
FXAIX Sharpe Ratio Rank: 76
FXAIX Sortino Ratio Rank: 67
FXAIX Omega Ratio Rank: 67
FXAIX Calmar Ratio Rank: 74
FXAIX Martin Ratio Rank: 83

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.

FCAUX vs. FXAIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Climate Action Fund (FCAUX) and Fidelity 500 Index Fund (FXAIX). 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.

	FCAUX	FXAIX	Difference
Sharpe ratio: Return per unit of total volatility	2.90	2.52	+0.38
Sortino ratio: Return per unit of downside risk	3.85	3.42	+0.42
Omega ratio: Gain probability vs. loss probability	1.50	1.46	+0.04
Calmar ratio: Return relative to maximum drawdown	4.25	3.36	+0.89
Martin ratio: Return relative to average drawdown	19.19	15.70	+3.49
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FCAUX vs. FXAIX - Sharpe Ratio Comparison

The current FCAUX Sharpe Ratio is 2.90, which is comparable to the FXAIX Sharpe Ratio of 2.52. The chart below compares the historical Sharpe Ratios of FCAUX and FXAIX, 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

	FCAUX	FXAIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.90	2.52	+0.38
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.85	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.87	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.63	0.82	-0.19

Drawdowns

FCAUX vs. FXAIX - Drawdown Comparison

The maximum FCAUX drawdown since its inception was -35.11%, roughly equal to the maximum FXAIX drawdown of -33.79%. Use the drawdown chart below to compare losses from any high point for FCAUX and FXAIX.

Drawdown Indicators

	FCAUX	FXAIX	Difference
Max Drawdown Largest peak-to-trough decline	-35.11%	-33.79%	-1.32%
Max Drawdown (1Y) Largest decline over 1 year	-10.47%	-8.89%	-1.58%
Max Drawdown (3Y) Largest decline over 3 years	-23.34%	-18.76%	-4.58%
Max Drawdown (5Y) Largest decline over 5 years	—	-24.50%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-33.79%	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-10.89%	-3.79%	-7.10%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.31%	1.90%	+0.41%

Volatility

FCAUX vs. FXAIX - Volatility Comparison

Fidelity Climate Action Fund (FCAUX) has a higher volatility of 4.32% compared to Fidelity 500 Index Fund (FXAIX) at 2.83%. This indicates that FCAUX's price experiences larger fluctuations and is considered to be riskier than FXAIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FCAUX	FXAIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.32%	2.83%	+1.49%
Volatility (6M) Calculated over the trailing 6-month period	11.74%	8.97%	+2.77%
Volatility (1Y) Calculated over the trailing 1-year period	15.33%	11.86%	+3.47%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.21%	16.91%	+2.30%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.21%	18.07%	+1.14%

FCAUX vs. FXAIX - Expense Ratio Comparison

FCAUX has a 1.04% expense ratio, which is higher than FXAIX's 0.02% expense ratio.

Dividends

FCAUX vs. FXAIX - Dividend Comparison

FCAUX has not paid dividends to shareholders, while FXAIX's dividend yield for the trailing twelve months is around 1.03%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FCAUX Fidelity Climate Action Fund	0.00%	0.00%	0.00%	0.15%	0.04%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
FXAIX Fidelity 500 Index Fund	1.03%	1.11%	1.25%	1.45%	1.69%	1.22%	1.60%	2.06%	2.72%	1.97%	2.52%	2.83%

Frequently Asked Questions

Can I hold both FCAUX and FXAIX in my portfolio?

With a correlation of 0.93, FCAUX and FXAIX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, FCAUX or FXAIX?

FCAUX has higher volatility (4.32%) compared to FXAIX (2.83%). In terms of maximum drawdown, FCAUX dropped -35.11% vs FXAIX's -33.79%.

Which has better risk-adjusted returns?

FCAUX currently has the higher Sharpe Ratio (2.90 vs 2.52), 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.