FITFX vs. FXAIX

Last updated Jun 23, 2026

FITFX (Fidelity Flex International Index Fund) and FXAIX (Fidelity 500 Index Fund) are both mutual funds - FITFX is a Foreign Large Cap Equities fund managed by Fidelity, while FXAIX is a S&P 500 fund tracking the S&P 500 Index. Over the past 5 years, FITFX returned 9.60%/yr vs 14.10%/yr for FXAIX. A 0.77 correlation means they provide meaningful diversification when combined. FITFX charges 0.00%/yr vs 0.02%/yr for FXAIX.

Performance

FITFX vs. FXAIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Flex International Index Fund (FITFX) 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, FITFX achieves a 16.42% return, which is significantly higher than FXAIX's 10.19% return.

FITFX

• 1D: 1.46%
• 1M: 3.34%
• YTD: 16.42%
• 6M: 17.33%
• 1Y: 35.23%
• 3Y*: 19.10%
• 5Y*: 9.60%
• 10Y*: —

FXAIX

• 1D: 1.09%
• 1M: 0.47%
• YTD: 10.19%
• 6M: 9.68%
• 1Y: 27.18%
• 3Y*: 20.98%
• 5Y*: 14.10%
• 10Y*: 15.58%

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

FITFX vs. FXAIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FITFX Fidelity Flex International Index Fund	16.42%	33.21%	5.37%	15.45%	-15.72%	7.76%	10.77%	21.44%	-13.97%	21.09%
FXAIX Fidelity 500 Index Fund	10.19%	17.84%	25.01%	26.29%	-18.14%	28.71%	18.42%	31.48%	-4.43%	14.95%

Correlation

The correlation between FITFX and FXAIX is 0.81, 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	0.81
Correlation (3Y) Calculated over the trailing 3-year period	0.74
Correlation (5Y) Calculated over the trailing 5-year period	0.76
Correlation (All Time) Calculated using the full available price history since Mar 9, 2017	0.77

The correlation between FITFX and FXAIX has been stable across timeframes, ranging from 0.74 to 0.81 - a consistent structural relationship.

Return for Risk

FITFX vs. FXAIX — Risk / Return Rank

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

FITFX

FITFX Risk / Return Rank: 65
FITFX Sharpe Ratio Rank: 67
FITFX Sortino Ratio Rank: 60
FITFX Omega Ratio Rank: 67
FITFX Calmar Ratio Rank: 69
FITFX Martin Ratio Rank: 64

FXAIX

FXAIX Risk / Return Rank: 66
FXAIX Sharpe Ratio Rank: 64
FXAIX Sortino Ratio Rank: 59
FXAIX Omega Ratio Rank: 61
FXAIX Calmar Ratio Rank: 68
FXAIX Martin Ratio Rank: 79

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.

FITFX vs. FXAIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Flex International Index Fund (FITFX) 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.

	FITFX	FXAIX	Difference
Sharpe ratio: Return per unit of total volatility	2.21	2.17	+0.04
Sortino ratio: Return per unit of downside risk	2.96	2.93	+0.03
Omega ratio: Gain probability vs. loss probability	1.41	1.39	+0.02
Calmar ratio: Return relative to maximum drawdown	3.07	3.04	+0.03
Martin ratio: Return relative to average drawdown	11.79	13.75	-1.95

FITFX vs. FXAIX - Sharpe Ratio Comparison

The current FITFX Sharpe Ratio is 2.21, which is comparable to the FXAIX Sharpe Ratio of 2.17. The chart below compares the historical Sharpe Ratios of FITFX 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

FITFX vs. FXAIX - Drawdown Comparison

The maximum FITFX drawdown since its inception was -34.84%, roughly equal to the maximum FXAIX drawdown of -33.79%. Use the drawdown chart below to compare losses from any high point for FITFX and FXAIX.

Drawdown Indicators

	FITFX	FXAIX	Difference
Max Drawdown Largest peak-to-trough decline	-34.84%	-33.79%	-1.05%
Max Drawdown (1Y) Largest decline over 1 year	-11.22%	-8.89%	-2.33%
Max Drawdown (3Y) Largest decline over 3 years	-13.35%	-18.76%	+5.41%
Max Drawdown (5Y) Largest decline over 5 years	-29.54%	-24.50%	-5.04%
Max Drawdown (10Y) Largest decline over 10 years	—	-33.79%	—
Current Drawdown Current decline from peak	0.00%	-1.36%	+1.36%
Average Drawdown Average peak-to-trough decline	-7.41%	-3.79%	-3.62%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.91%	1.96%	+0.95%

Volatility

FITFX vs. FXAIX - Volatility Comparison

Fidelity Flex International Index Fund (FITFX) has a higher volatility of 6.43% compared to Fidelity 500 Index Fund (FXAIX) at 4.77%. This indicates that FITFX'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

	FITFX	FXAIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.43%	4.77%	+1.66%
Volatility (6M) Calculated over the trailing 6-month period	13.52%	9.91%	+3.61%
Volatility (1Y) Calculated over the trailing 1-year period	15.62%	12.47%	+3.15%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.57%	17.01%	-1.44%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.40%	18.11%	-1.71%

FITFX vs. FXAIX - Expense Ratio Comparison

FITFX has a 0.00% expense ratio, which is lower than FXAIX's 0.02% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

FITFX vs. FXAIX - Dividend Comparison

FITFX's dividend yield for the trailing twelve months is around 2.48%, more than FXAIX's 1.04% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FITFX Fidelity Flex International Index Fund	2.48%	2.88%	2.77%	2.67%	2.60%	2.25%	1.50%	2.54%	1.92%	1.70%	0.00%	0.00%
FXAIX Fidelity 500 Index Fund	1.04%	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 FITFX and FXAIX in my portfolio?

FITFX and FXAIX have a correlation of 0.81, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FITFX or FXAIX?

FITFX has higher volatility (6.43%) compared to FXAIX (4.77%). In terms of maximum drawdown, FITFX dropped -34.84% vs FXAIX's -33.79%.

Which has better risk-adjusted returns?

FITFX currently has the higher Sharpe Ratio (2.21 vs 2.17), 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.