FITFX vs. FDFIX

Last updated Jun 4, 2026

FITFX (Fidelity Flex International Index Fund) and FDFIX (Fidelity Flex 500 Index Fund) are both mutual funds - FITFX is a Foreign Large Cap Equities fund managed by Fidelity, while FDFIX is a Large Cap Blend Equities fund managed by Fidelity. Over the past 5 years, FITFX returned 9.17%/yr vs 14.20%/yr for FDFIX. A 0.77 correlation means they provide meaningful diversification when combined. Both charge a 0.00% expense ratio.

Performance

FITFX vs. FDFIX - Performance Comparison

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

Returns By Period

In the year-to-date period, FITFX achieves a 16.24% return, which is significantly higher than FDFIX's 11.53% return.

FITFX

• 1D: 0.72%
• 1M: 6.16%
• YTD: 16.24%
• 6M: 19.13%
• 1Y: 34.57%
• 3Y*: 20.37%
• 5Y*: 9.17%
• 10Y*: —

FDFIX

• 1D: 0.22%
• 1M: 6.02%
• YTD: 11.53%
• 6M: 11.45%
• 1Y: 28.49%
• 3Y*: 22.62%
• 5Y*: 14.20%
• 10Y*: —

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

FITFX vs. FDFIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FITFX Fidelity Flex International Index Fund	16.24%	33.21%	5.37%	15.45%	-15.72%	7.76%	10.77%	21.44%	-13.97%	21.09%
FDFIX Fidelity Flex 500 Index Fund	11.53%	17.59%	25.06%	26.27%	-18.10%	28.69%	18.46%	31.47%	-4.45%	14.41%

Correlation

The correlation between FITFX and FDFIX is 0.79, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.79
Correlation (3Y) Calculated over the trailing 3-year period	0.73
Correlation (5Y) Calculated over the trailing 5-year period	0.75
Correlation (All Time) Calculated using the full available price history since Mar 10, 2017	0.77

The correlation between FITFX and FDFIX has been stable across timeframes, ranging from 0.73 to 0.79 - a consistent structural relationship.

Return for Risk

FITFX vs. FDFIX — Risk / Return Rank

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

FITFX

FITFX Risk / Return Rank: 61
FITFX Sharpe Ratio Rank: 64
FITFX Sortino Ratio Rank: 57
FITFX Omega Ratio Rank: 61
FITFX Calmar Ratio Rank: 63
FITFX Martin Ratio Rank: 60

FDFIX

FDFIX Risk / Return Rank: 70
FDFIX Sharpe Ratio Rank: 72
FDFIX Sortino Ratio Rank: 64
FDFIX Omega Ratio Rank: 64
FDFIX Calmar Ratio Rank: 72
FDFIX Martin Ratio Rank: 80

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. FDFIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Flex International Index Fund (FITFX) and Fidelity Flex 500 Index Fund (FDFIX). 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.

	FITFX	FDFIX	Difference
Sharpe ratio Return per unit of total volatility	2.35	2.47	-0.12
Sortino ratio Return per unit of downside risk	3.17	3.34	-0.17
Omega ratio Gain probability vs. loss probability	1.43	1.45	-0.01
Calmar ratio Return relative to maximum drawdown	3.06	3.28	-0.22
Martin ratio Return relative to average drawdown	11.95	14.96	-3.01
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FITFX vs. FDFIX - Sharpe Ratio Comparison

The current FITFX Sharpe Ratio is 2.35, which is comparable to the FDFIX Sharpe Ratio of 2.47. The chart below compares the historical Sharpe Ratios of FITFX and FDFIX, 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

	FITFX	FDFIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.35	2.47	-0.12
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.60	0.84	-0.24
Sharpe Ratio (All Time) Calculated using the full available price history	0.61	0.82	-0.21

Drawdowns

FITFX vs. FDFIX - Drawdown Comparison

The maximum FITFX drawdown since its inception was -34.84%, roughly equal to the maximum FDFIX drawdown of -33.77%. Use the drawdown chart below to compare losses from any high point for FITFX and FDFIX.

Drawdown Indicators

	FITFX	FDFIX	Difference
Max Drawdown Largest peak-to-trough decline	-34.84%	-33.77%	-1.07%
Max Drawdown (1Y) Largest decline over 1 year	-11.22%	-8.99%	-2.23%
Max Drawdown (3Y) Largest decline over 3 years	-13.35%	-18.76%	+5.41%
Max Drawdown (5Y) Largest decline over 5 years	-29.74%	-24.51%	-5.23%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-7.44%	-4.58%	-2.86%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.86%	1.97%	+0.89%

Volatility

FITFX vs. FDFIX - Volatility Comparison

Fidelity Flex International Index Fund (FITFX) has a higher volatility of 4.92% compared to Fidelity Flex 500 Index Fund (FDFIX) at 2.92%. This indicates that FITFX's price experiences larger fluctuations and is considered to be riskier than FDFIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FITFX	FDFIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.92%	2.92%	+2.00%
Volatility (6M) Calculated over the trailing 6-month period	12.26%	9.03%	+3.23%
Volatility (1Y) Calculated over the trailing 1-year period	14.64%	11.96%	+2.68%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.38%	16.95%	-1.57%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.34%	18.59%	-2.25%

FITFX vs. FDFIX - Expense Ratio Comparison

FITFX has a 0.00% expense ratio, which is lower than FDFIX's 0.00% 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. FDFIX - Dividend Comparison

FITFX's dividend yield for the trailing twelve months is around 2.48%, more than FDFIX's 1.03% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
FDFIX Fidelity Flex 500 Index Fund	1.03%	1.11%	1.26%	1.48%	1.70%	1.27%	1.52%	1.78%	2.16%	0.50%
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%

Frequently Asked Questions

Can I hold both FITFX and FDFIX in my portfolio?

FITFX and FDFIX have a correlation of 0.79, 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 FDFIX?

FITFX has higher volatility (4.92%) compared to FDFIX (2.92%). In terms of maximum drawdown, FITFX dropped -34.84% vs FDFIX's -33.77%.

Which has better risk-adjusted returns?

FDFIX currently has the higher Sharpe Ratio (2.47 vs 2.35), 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.