SFYF vs. FDFIX

Last updated Jun 4, 2026

SFYF (SoFi Social 50 ETF) and FDFIX (Fidelity Flex 500 Index Fund) are both funds - SFYF is a Large Cap Growth Equities fund tracking the SoFi Social 50 Index, while FDFIX is a Large Cap Blend Equities fund managed by Fidelity. Over the past 5 years, SFYF returned 12.34%/yr vs 14.20%/yr for FDFIX. Their correlation of 0.82 suggests significant overlap in exposure. SFYF charges 0.29%/yr vs 0.00%/yr for FDFIX.

Performance

SFYF vs. FDFIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SoFi Social 50 ETF (SFYF) 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, SFYF achieves a 14.85% return, which is significantly higher than FDFIX's 11.53% return.

SFYF

• 1D: -0.85%
• 1M: 8.95%
• YTD: 14.85%
• 6M: 14.20%
• 1Y: 43.96%
• 3Y*: 36.32%
• 5Y*: 12.34%
• 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)

SFYF vs. FDFIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
SFYF SoFi Social 50 ETF	14.85%	30.00%	44.62%	56.80%	-47.73%	35.83%	33.65%	4.95%
FDFIX Fidelity Flex 500 Index Fund	11.53%	17.59%	25.06%	26.27%	-18.10%	28.69%	18.46%	13.73%

Correlation

The correlation between SFYF and FDFIX is 0.86, 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	0.87
Correlation (3Y) Calculated over the trailing 3-year period	0.85
Correlation (5Y) Calculated over the trailing 5-year period	0.83
Correlation (All Time) Calculated using the full available price history since May 9, 2019	0.82

The correlation between SFYF and FDFIX has been stable across timeframes, ranging from 0.82 to 0.86 - a consistent structural relationship.

Return for Risk

SFYF vs. FDFIX — Risk / Return Rank

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

SFYF

SFYF Risk / Return Rank: 63
SFYF Sharpe Ratio Rank: 71
SFYF Sortino Ratio Rank: 64
SFYF Omega Ratio Rank: 64
SFYF Calmar Ratio Rank: 58
SFYF Martin Ratio Rank: 55

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.

SFYF vs. FDFIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SoFi Social 50 ETF (SFYF) 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.

	SFYF	FDFIX	Difference
Sharpe ratio: Return per unit of total volatility	2.36	2.47	-0.11
Sortino ratio: Return per unit of downside risk	3.01	3.34	-0.33
Omega ratio: Gain probability vs. loss probability	1.40	1.45	-0.05
Calmar ratio: Return relative to maximum drawdown	2.91	3.28	-0.37
Martin ratio: Return relative to average drawdown	9.65	14.96	-5.31
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SFYF vs. FDFIX - Sharpe Ratio Comparison

The current SFYF Sharpe Ratio is 2.36, which is comparable to the FDFIX Sharpe Ratio of 2.47. The chart below compares the historical Sharpe Ratios of SFYF 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

	SFYF	FDFIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.36	2.47	-0.11
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.42	0.84	-0.42
Sharpe Ratio (All Time) Calculated using the full available price history	0.61	0.82	-0.21

Drawdowns

SFYF vs. FDFIX - Drawdown Comparison

The maximum SFYF drawdown since its inception was -56.09%, which is greater than FDFIX's maximum drawdown of -33.77%. Use the drawdown chart below to compare losses from any high point for SFYF and FDFIX.

Drawdown Indicators

	SFYF	FDFIX	Difference
Max Drawdown Largest peak-to-trough decline	-56.09%	-33.77%	-22.32%
Max Drawdown (1Y) Largest decline over 1 year	-15.18%	-8.99%	-6.19%
Max Drawdown (3Y) Largest decline over 3 years	-26.45%	-18.76%	-7.69%
Max Drawdown (5Y) Largest decline over 5 years	-56.09%	-24.51%	-31.58%
Current Drawdown Current decline from peak	-1.68%	0.00%	-1.68%
Average Drawdown Average peak-to-trough decline	-16.58%	-4.58%	-12.00%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.57%	1.97%	+2.60%

Volatility

SFYF vs. FDFIX - Volatility Comparison

SoFi Social 50 ETF (SFYF) has a higher volatility of 5.58% compared to Fidelity Flex 500 Index Fund (FDFIX) at 2.92%. This indicates that SFYF'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

	SFYF	FDFIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.58%	2.92%	+2.66%
Volatility (6M) Calculated over the trailing 6-month period	13.21%	9.03%	+4.18%
Volatility (1Y) Calculated over the trailing 1-year period	18.74%	11.96%	+6.78%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	29.28%	16.95%	+12.33%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	30.68%	18.59%	+12.09%

SFYF vs. FDFIX - Expense Ratio Comparison

SFYF has a 0.29% expense ratio, which is higher than FDFIX's 0.00% expense ratio.

Dividends

SFYF vs. FDFIX - Dividend Comparison

SFYF's dividend yield for the trailing twelve months is around 0.29%, less 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%
SFYF SoFi Social 50 ETF	0.29%	0.33%	0.31%	1.71%	1.19%	0.26%	0.40%	0.73%	0.00%	0.00%

Frequently Asked Questions

Can I hold both SFYF and FDFIX in my portfolio?

SFYF and FDFIX have a correlation of 0.86, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SFYF or FDFIX?

SFYF has higher volatility (5.58%) compared to FDFIX (2.92%). In terms of maximum drawdown, SFYF dropped -56.09% vs FDFIX's -33.77%.

Which has better risk-adjusted returns?

FDFIX currently has the higher Sharpe Ratio (2.47 vs 2.36), 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.