SISEX vs. SPY

Last updated Jun 23, 2026

SISEX (Shelton International Select Equity Fund) and SPY (State Street SPDR S&P 500 ETF) are both funds - SISEX is a Foreign Large Cap Equities fund managed by Shelton Capital Management, while SPY is a S&P 500 fund tracking the S&P 500 Index. Over the past 5 years, SISEX returned 7.45%/yr vs 13.51%/yr for SPY. A 0.58 correlation means they provide meaningful diversification when combined. SISEX charges 0.99%/yr vs 0.09%/yr for SPY.

Performance

SISEX vs. SPY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Shelton International Select Equity Fund (SISEX) and State Street SPDR S&P 500 ETF (SPY). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SISEX achieves a 13.68% return, which is significantly higher than SPY's 9.74% return.

SISEX

• 1D: 0.03%
• 1M: -0.47%
• YTD: 13.68%
• 6M: 13.90%
• 1Y: 28.51%
• 3Y*: 15.75%
• 5Y*: 7.45%
• 10Y*: —

SPY

• 1D: -0.31%
• 1M: 0.09%
• YTD: 9.74%
• 6M: 9.27%
• 1Y: 26.65%
• 3Y*: 21.27%
• 5Y*: 13.51%
• 10Y*: 15.70%

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

SISEX vs. SPY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SISEX Shelton International Select Equity Fund	13.68%	30.66%	3.67%	13.97%	-19.29%	6.23%	18.07%	22.53%	-13.16%	34.49%
SPY State Street SPDR S&P 500 ETF	9.74%	17.72%	24.89%	26.18%	-18.18%	28.73%	18.33%	31.22%	-4.57%	21.71%

Correlation

The correlation between SISEX and SPY is 0.47, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.47
Correlation (3Y) Calculated over the trailing 3-year period	0.47
Correlation (5Y) Calculated over the trailing 5-year period	0.55
Correlation (All Time) Calculated using the full available price history since Jan 3, 2017	0.58

The correlation between SISEX and SPY shifts across timeframes, from 0.47 (3 years) to 0.58 (all time), reflecting how their relationship changes across market environments.

Return for Risk

SISEX vs. SPY — Risk / Return Rank

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

SISEX

SISEX Risk / Return Rank: 45
SISEX Sharpe Ratio Rank: 48
SISEX Sortino Ratio Rank: 48
SISEX Omega Ratio Rank: 48
SISEX Calmar Ratio Rank: 41
SISEX Martin Ratio Rank: 42

SPY

SPY Risk / Return Rank: 68
SPY Sharpe Ratio Rank: 69
SPY Sortino Ratio Rank: 66
SPY Omega Ratio Rank: 68
SPY Calmar Ratio Rank: 63
SPY Martin Ratio Rank: 74

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.

SISEX vs. SPY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Shelton International Select Equity Fund (SISEX) and State Street SPDR S&P 500 ETF (SPY). 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.

	SISEX	SPY	Difference
Sharpe ratio: Return per unit of total volatility	1.89	2.16	-0.26
Sortino ratio: Return per unit of downside risk	2.68	2.91	-0.23
Omega ratio: Gain probability vs. loss probability	1.35	1.39	-0.04
Calmar ratio: Return relative to maximum drawdown	2.31	3.01	-0.70
Martin ratio: Return relative to average drawdown	8.47	13.54	-5.06

SISEX vs. SPY - Sharpe Ratio Comparison

The current SISEX Sharpe Ratio is 1.89, which is comparable to the SPY Sharpe Ratio of 2.16. The chart below compares the historical Sharpe Ratios of SISEX and SPY, 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

SISEX vs. SPY - Drawdown Comparison

The maximum SISEX drawdown since its inception was -32.68%, smaller than the maximum SPY drawdown of -55.19%. Use the drawdown chart below to compare losses from any high point for SISEX and SPY.

Drawdown Indicators

	SISEX	SPY	Difference
Max Drawdown Largest peak-to-trough decline	-32.68%	-55.19%	+22.51%
Max Drawdown (1Y) Largest decline over 1 year	-11.94%	-8.88%	-3.06%
Max Drawdown (3Y) Largest decline over 3 years	-14.30%	-18.76%	+4.46%
Max Drawdown (5Y) Largest decline over 5 years	-32.68%	-24.50%	-8.18%
Max Drawdown (10Y) Largest decline over 10 years	—	-33.72%	—
Current Drawdown Current decline from peak	-1.65%	-1.75%	+0.10%
Average Drawdown Average peak-to-trough decline	-7.47%	-9.04%	+1.57%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.26%	1.97%	+1.29%

Volatility

SISEX vs. SPY - Volatility Comparison

Shelton International Select Equity Fund (SISEX) and State Street SPDR S&P 500 ETF (SPY) have volatilities of 4.62% and 4.64%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SISEX	SPY	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.62%	4.64%	-0.02%
Volatility (6M) Calculated over the trailing 6-month period	12.30%	9.75%	+2.55%
Volatility (1Y) Calculated over the trailing 1-year period	14.59%	12.43%	+2.16%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.33%	17.14%	-1.81%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.45%	17.99%	-2.54%

SISEX vs. SPY - Expense Ratio Comparison

SISEX has a 0.99% expense ratio, which is higher than SPY's 0.09% expense ratio.

Dividends

SISEX vs. SPY - Dividend Comparison

SISEX's dividend yield for the trailing twelve months is around 1.56%, more than SPY's 1.01% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SISEX Shelton International Select Equity Fund	1.56%	1.77%	3.73%	1.83%	5.50%	0.65%	0.80%	2.09%	1.13%	1.88%	0.00%	0.00%
SPY State Street SPDR S&P 500 ETF	1.01%	1.07%	1.21%	1.40%	1.65%	1.20%	1.52%	1.75%	2.04%	1.80%	2.03%	2.06%

Frequently Asked Questions

Can I hold both SISEX and SPY in my portfolio?

SISEX and SPY have a correlation of 0.47, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SISEX or SPY?

SPY has higher volatility (4.64%) compared to SISEX (4.62%). In terms of maximum drawdown, SISEX dropped -32.68% vs SPY's -55.19%.

Which has better risk-adjusted returns?

SPY currently has the higher Sharpe Ratio (2.16 vs 1.89), 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.