FIDJX vs. FXAIX

Last updated Jun 26, 2026

FIDJX (Fidelity SAI Sustainable Sector Fund) and FXAIX (Fidelity 500 Index Fund) are both mutual funds - FIDJX is a Large Cap Blend Equities fund actively managed by Fidelity, while FXAIX is a S&P 500 fund tracking the S&P 500 Index. FIDJX is actively managed, while FXAIX is passively managed. Over the past 3 years, FIDJX returned 22.61%/yr vs 20.77%/yr for FXAIX. With a 0.99 correlation, they move nearly in lockstep. FIDJX charges 0.44%/yr vs 0.02%/yr for FXAIX.

Performance

FIDJX vs. FXAIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity SAI Sustainable Sector Fund (FIDJX) 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, FIDJX achieves a 13.15% return, which is significantly higher than FXAIX's 8.11% return.

FIDJX

• 1D: 0.11%
• 1M: -1.25%
• YTD: 13.15%
• 6M: 11.83%
• 1Y: 29.72%
• 3Y*: 22.61%
• 5Y*: —
• 10Y*: —

FXAIX

• 1D: -0.10%
• 1M: -2.04%
• YTD: 8.11%
• 6M: 6.78%
• 1Y: 22.23%
• 3Y*: 20.77%
• 5Y*: 13.05%
• 10Y*: 15.62%

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

FIDJX vs. FXAIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
FIDJX Fidelity SAI Sustainable Sector Fund	13.15%	17.55%	23.85%	31.66%	-10.52%
FXAIX Fidelity 500 Index Fund	8.11%	17.84%	25.01%	26.29%	-9.05%

Correlation

The correlation between FIDJX and FXAIX is 0.98 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.98
Correlation (3Y) Calculated over the trailing 3-year period	0.98
Correlation (All Time) Calculated using the full available price history since Apr 25, 2022	0.99

The correlation between FIDJX and FXAIX has been stable across timeframes, ranging from 0.98 to 0.99 - a consistent structural relationship.

Return for Risk

FIDJX vs. FXAIX — Risk / Return Rank

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

FIDJX

FIDJX Risk / Return Rank: 80
FIDJX Sharpe Ratio Rank: 78
FIDJX Sortino Ratio Rank: 72
FIDJX Omega Ratio Rank: 73
FIDJX Calmar Ratio Rank: 85
FIDJX Martin Ratio Rank: 92

FXAIX

FXAIX Risk / Return Rank: 55
FXAIX Sharpe Ratio Rank: 52
FXAIX Sortino Ratio Rank: 48
FXAIX Omega Ratio Rank: 50
FXAIX Calmar Ratio Rank: 56
FXAIX Martin Ratio Rank: 68

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.

FIDJX vs. FXAIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity SAI Sustainable Sector Fund (FIDJX) 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.

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.

	FIDJX	FXAIX	Difference
Sharpe ratio: Return per unit of total volatility	2.20	1.79	+0.42
Sortino ratio: Return per unit of downside risk	2.95	2.45	+0.50
Omega ratio: Gain probability vs. loss probability	1.39	1.32	+0.07
Calmar ratio: Return relative to maximum drawdown	3.51	2.51	+1.00
Martin ratio: Return relative to average drawdown	16.20	11.22	+4.98

FIDJX vs. FXAIX - Sharpe Ratio Comparison

The current FIDJX Sharpe Ratio is 2.20, which is comparable to the FXAIX Sharpe Ratio of 1.79. The chart below compares the historical Sharpe Ratios of FIDJX 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.

Drawdowns

FIDJX vs. FXAIX - Drawdown Comparison

The maximum FIDJX drawdown since its inception was -20.43%, smaller than the maximum FXAIX drawdown of -33.79%. Use the drawdown chart below to compare losses from any high point for FIDJX and FXAIX.

Drawdown Indicators

	FIDJX	FXAIX	Difference
Max Drawdown Largest peak-to-trough decline	-20.43%	-33.79%	+13.36%
Max Drawdown (1Y) Largest decline over 1 year	-8.63%	-8.89%	+0.26%
Max Drawdown (3Y) Largest decline over 3 years	-20.43%	-18.76%	-1.67%
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	-2.51%	-3.22%	+0.71%
Average Drawdown Average peak-to-trough decline	-3.52%	-3.79%	+0.27%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.86%	1.99%	-0.13%

Volatility

FIDJX vs. FXAIX - Volatility Comparison

Fidelity SAI Sustainable Sector Fund (FIDJX) has a higher volatility of 5.79% compared to Fidelity 500 Index Fund (FXAIX) at 4.88%. This indicates that FIDJX'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

	FIDJX	FXAIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.79%	4.88%	+0.91%
Volatility (6M) Calculated over the trailing 6-month period	11.07%	9.90%	+1.17%
Volatility (1Y) Calculated over the trailing 1-year period	13.76%	12.54%	+1.22%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.21%	17.02%	+1.19%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.21%	18.08%	+0.13%

FIDJX vs. FXAIX - Expense Ratio Comparison

FIDJX has a 0.44% expense ratio, which is higher than FXAIX's 0.02% expense ratio.

Dividends

FIDJX vs. FXAIX - Dividend Comparison

FIDJX's dividend yield for the trailing twelve months is around 0.53%, less than FXAIX's 1.06% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FIDJX Fidelity SAI Sustainable Sector Fund	0.53%	0.60%	1.74%	0.52%	0.44%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
FXAIX Fidelity 500 Index Fund	1.06%	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 FIDJX and FXAIX in my portfolio?

With a correlation of 0.98, FIDJX 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, FIDJX or FXAIX?

FIDJX has higher volatility (5.79%) compared to FXAIX (4.88%). In terms of maximum drawdown, FIDJX dropped -20.43% vs FXAIX's -33.79%.

Which has better risk-adjusted returns?

FIDJX currently has the higher Sharpe Ratio (2.20 vs 1.79), 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.