SFY vs. SPFIX

Last updated Jun 5, 2026

SFY (SoFi Select 500 ETF) and SPFIX (Shelton Capital Management S&P 500 Index Fund) are both funds - SFY is a Large Cap Growth Equities fund tracking the Solactive SoFi US 500 Growth Index, while SPFIX is a S&P 500 fund tracking the S&P 500 Index. Both are passively managed. Over the past 5 years, SFY returned 15.91%/yr vs 16.54%/yr for SPFIX. With a 0.96 correlation, they move nearly in lockstep. SFY charges 0.00%/yr vs 0.43%/yr for SPFIX.

Performance

SFY vs. SPFIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SoFi Select 500 ETF (SFY) and Shelton Capital Management S&P 500 Index Fund (SPFIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SFY achieves a 14.75% return, which is significantly higher than SPFIX's 10.61% return.

SFY

• 1D: 0.21%
• 1M: 6.84%
• YTD: 14.75%
• 6M: 14.54%
• 1Y: 35.47%
• 3Y*: 27.66%
• 5Y*: 15.91%
• 10Y*: —

SPFIX

• 1D: -0.73%
• 1M: 4.09%
• YTD: 10.61%
• 6M: 10.48%
• 1Y: 27.51%
• 3Y*: 27.51%
• 5Y*: 16.54%
• 10Y*: 17.60%

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

SFY vs. SPFIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
SFY SoFi Select 500 ETF	14.75%	22.67%	29.81%	29.36%	-22.84%	28.03%	24.52%	13.38%
SPFIX Shelton Capital Management S&P 500 Index Fund	10.61%	17.23%	42.83%	25.48%	-18.22%	27.99%	17.41%	22.42%

Correlation

The correlation between SFY and SPFIX is 0.96 - 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	0.96
Correlation (3Y) Calculated over the trailing 3-year period	0.96
Correlation (5Y) Calculated over the trailing 5-year period	0.97
Correlation (All Time) Calculated using the full available price history since Apr 12, 2019	0.96

The correlation between SFY and SPFIX has been stable across timeframes, ranging from 0.96 to 0.97 - a consistent structural relationship.

Return for Risk

SFY vs. SPFIX — Risk / Return Rank

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

SFY

SFY Risk / Return Rank: 74
SFY Sharpe Ratio Rank: 77
SFY Sortino Ratio Rank: 74
SFY Omega Ratio Rank: 73
SFY Calmar Ratio Rank: 67
SFY Martin Ratio Rank: 76

SPFIX

SPFIX Risk / Return Rank: 65
SPFIX Sharpe Ratio Rank: 64
SPFIX Sortino Ratio Rank: 58
SPFIX Omega Ratio Rank: 59
SPFIX Calmar Ratio Rank: 65
SPFIX Martin Ratio Rank: 77

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.

SFY vs. SPFIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SoFi Select 500 ETF (SFY) and Shelton Capital Management S&P 500 Index Fund (SPFIX). 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.

	SFY	SPFIX	Difference
Sharpe ratio: Return per unit of total volatility	2.47	2.34	+0.13
Sortino ratio: Return per unit of downside risk	3.27	3.20	+0.07
Omega ratio: Gain probability vs. loss probability	1.43	1.42	+0.01
Calmar ratio: Return relative to maximum drawdown	3.30	3.10	+0.20
Martin ratio: Return relative to average drawdown	14.42	14.45	-0.03
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SFY vs. SPFIX - Sharpe Ratio Comparison

The current SFY Sharpe Ratio is 2.47, which is comparable to the SPFIX Sharpe Ratio of 2.34. The chart below compares the historical Sharpe Ratios of SFY and SPFIX, 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

	SFY	SPFIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.47	2.34	+0.13
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.84	0.91	-0.07
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.94	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.90	0.59	+0.31

Drawdowns

SFY vs. SPFIX - Drawdown Comparison

The maximum SFY drawdown since its inception was -33.25%, smaller than the maximum SPFIX drawdown of -54.81%. Use the drawdown chart below to compare losses from any high point for SFY and SPFIX.

Drawdown Indicators

	SFY	SPFIX	Difference
Max Drawdown Largest peak-to-trough decline	-33.25%	-54.81%	+21.56%
Max Drawdown (1Y) Largest decline over 1 year	-10.79%	-8.90%	-1.89%
Max Drawdown (3Y) Largest decline over 3 years	-21.04%	-18.94%	-2.10%
Max Drawdown (5Y) Largest decline over 5 years	-27.72%	-24.69%	-3.03%
Max Drawdown (10Y) Largest decline over 10 years	—	-33.83%	—
Current Drawdown Current decline from peak	-0.82%	-0.73%	-0.09%
Average Drawdown Average peak-to-trough decline	-6.18%	-8.95%	+2.77%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.47%	1.91%	+0.56%

Volatility

SFY vs. SPFIX - Volatility Comparison

SoFi Select 500 ETF (SFY) has a higher volatility of 4.00% compared to Shelton Capital Management S&P 500 Index Fund (SPFIX) at 2.92%. This indicates that SFY's price experiences larger fluctuations and is considered to be riskier than SPFIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SFY	SPFIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.00%	2.92%	+1.08%
Volatility (6M) Calculated over the trailing 6-month period	11.09%	8.95%	+2.14%
Volatility (1Y) Calculated over the trailing 1-year period	14.44%	11.84%	+2.60%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.01%	18.23%	+0.78%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.19%	18.88%	+1.31%

SFY vs. SPFIX - Expense Ratio Comparison

SFY has a 0.00% expense ratio, which is lower than SPFIX's 0.43% expense ratio.

Dividends

SFY vs. SPFIX - Dividend Comparison

SFY's dividend yield for the trailing twelve months is around 0.84%, less than SPFIX's 3.29% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SFY SoFi Select 500 ETF	0.84%	0.96%	0.99%	1.40%	1.61%	0.90%	1.18%	1.02%	0.00%	0.00%	0.00%	0.00%
SPFIX Shelton Capital Management S&P 500 Index Fund	3.29%	3.45%	27.20%	8.08%	5.07%	5.43%	8.06%	16.60%	2.49%	3.01%	2.92%	4.35%

Frequently Asked Questions

Can I hold both SFY and SPFIX in my portfolio?

With a correlation of 0.96, SFY and SPFIX 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, SFY or SPFIX?

SFY has higher volatility (4.00%) compared to SPFIX (2.92%). In terms of maximum drawdown, SFY dropped -33.25% vs SPFIX's -54.81%.

Which has better risk-adjusted returns?

SFY currently has the higher Sharpe Ratio (2.47 vs 2.34), 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.