SNSAX vs. SPIIX

Last updated Jun 4, 2026

SNSAX (SEI Asset Allocation Trust Defensive Strategy Fund) and SPIIX (SEI S&P 500 Index Fund Class I) are both mutual funds - SNSAX is a Short-Term Bond fund managed by SEI, while SPIIX is a Large Cap Blend Equities fund tracking the S&P 500 Index. Over the past 10 years, SNSAX returned 2.86%/yr vs 14.89%/yr for SPIIX. A 0.55 correlation means they provide meaningful diversification when combined. SNSAX charges 0.61%/yr vs 0.65%/yr for SPIIX.

Performance

SNSAX vs. SPIIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SEI Asset Allocation Trust Defensive Strategy Fund (SNSAX) and SEI S&P 500 Index Fund Class I (SPIIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SNSAX achieves a 1.86% return, which is significantly lower than SPIIX's 11.33% return. Over the past 10 years, SNSAX has underperformed SPIIX with an annualized return of 2.86%, while SPIIX has yielded a comparatively higher 14.89% annualized return.

SNSAX

• 1D: 0.00%
• 1M: 0.41%
• YTD: 1.86%
• 6M: 2.07%
• 1Y: 5.44%
• 3Y*: 5.47%
• 5Y*: 2.97%
• 10Y*: 2.86%

SPIIX

• 1D: 0.12%
• 1M: 5.72%
• YTD: 11.33%
• 6M: 11.21%
• 1Y: 27.96%
• 3Y*: 21.87%
• 5Y*: 13.46%
• 10Y*: 14.89%

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

SNSAX vs. SPIIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SNSAX SEI Asset Allocation Trust Defensive Strategy Fund	1.86%	6.29%	5.12%	4.67%	-3.55%	2.35%	2.72%	6.25%	-0.26%	2.81%
SPIIX SEI S&P 500 Index Fund Class I	11.33%	16.97%	24.11%	25.49%	-18.84%	28.04%	17.66%	30.72%	-5.00%	21.06%

Correlation

The correlation between SNSAX and SPIIX is 0.53, 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	0.53
Correlation (3Y) Calculated over the trailing 3-year period	0.50
Correlation (5Y) Calculated over the trailing 5-year period	0.55
Correlation (10Y) Calculated over the trailing 10-year period	0.59
Correlation (All Time) Calculated using the full available price history since Nov 19, 2003	0.55

The correlation between SNSAX and SPIIX has been stable across timeframes, ranging from 0.50 to 0.59 - a consistent structural relationship.

Return for Risk

SNSAX vs. SPIIX — Risk / Return Rank

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

SNSAX

SNSAX Risk / Return Rank: 89
SNSAX Sharpe Ratio Rank: 92
SNSAX Sortino Ratio Rank: 94
SNSAX Omega Ratio Rank: 91
SNSAX Calmar Ratio Rank: 83
SNSAX Martin Ratio Rank: 83

SPIIX

SPIIX Risk / Return Rank: 68
SPIIX Sharpe Ratio Rank: 70
SPIIX Sortino Ratio Rank: 62
SPIIX Omega Ratio Rank: 63
SPIIX Calmar Ratio Rank: 69
SPIIX 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.

SNSAX vs. SPIIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SEI Asset Allocation Trust Defensive Strategy Fund (SNSAX) and SEI S&P 500 Index Fund Class I (SPIIX). 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.

	SNSAX	SPIIX	Difference
Sharpe ratio: Return per unit of total volatility	3.12	2.44	+0.68
Sortino ratio: Return per unit of downside risk	4.81	3.31	+1.50
Omega ratio: Gain probability vs. loss probability	1.68	1.44	+0.24
Calmar ratio: Return relative to maximum drawdown	3.87	3.20	+0.68
Martin ratio: Return relative to average drawdown	15.62	14.82	+0.81
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SNSAX vs. SPIIX - Sharpe Ratio Comparison

The current SNSAX Sharpe Ratio is 3.12, which is comparable to the SPIIX Sharpe Ratio of 2.44. The chart below compares the historical Sharpe Ratios of SNSAX and SPIIX, 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

	SNSAX	SPIIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.12	2.44	+0.68
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	1.07	0.73	+0.34
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	1.12	0.79	+0.32
Sharpe Ratio (All Time) Calculated using the full available price history	1.16	0.57	+0.59

Drawdowns

SNSAX vs. SPIIX - Drawdown Comparison

The maximum SNSAX drawdown since its inception was -12.22%, smaller than the maximum SPIIX drawdown of -55.78%. Use the drawdown chart below to compare losses from any high point for SNSAX and SPIIX.

Drawdown Indicators

	SNSAX	SPIIX	Difference
Max Drawdown Largest peak-to-trough decline	-12.22%	-55.78%	+43.56%
Max Drawdown (1Y) Largest decline over 1 year	-1.41%	-9.02%	+7.61%
Max Drawdown (3Y) Largest decline over 3 years	-1.96%	-25.70%	+23.74%
Max Drawdown (5Y) Largest decline over 5 years	-6.87%	-25.70%	+18.83%
Max Drawdown (10Y) Largest decline over 10 years	-6.87%	-33.85%	+26.98%
Current Drawdown Current decline from peak	-0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-1.83%	-7.28%	+5.45%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.35%	1.94%	-1.59%

Volatility

SNSAX vs. SPIIX - Volatility Comparison

The current volatility for SEI Asset Allocation Trust Defensive Strategy Fund (SNSAX) is 0.49%, while SEI S&P 500 Index Fund Class I (SPIIX) has a volatility of 2.83%. This indicates that SNSAX experiences smaller price fluctuations and is considered to be less risky than SPIIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SNSAX	SPIIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.49%	2.83%	-2.34%
Volatility (6M) Calculated over the trailing 6-month period	1.30%	8.94%	-7.64%
Volatility (1Y) Calculated over the trailing 1-year period	1.75%	11.83%	-10.08%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.79%	18.44%	-15.65%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.57%	18.87%	-16.30%

SNSAX vs. SPIIX - Expense Ratio Comparison

SNSAX has a 0.61% expense ratio, which is lower than SPIIX's 0.65% expense ratio.

Dividends

SNSAX vs. SPIIX - Dividend Comparison

SNSAX's dividend yield for the trailing twelve months is around 3.12%, less than SPIIX's 7.57% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SNSAX SEI Asset Allocation Trust Defensive Strategy Fund	3.12%	3.19%	4.20%	3.08%	3.74%	3.47%	1.88%	2.40%	1.81%	1.85%	1.19%	1.21%
SPIIX SEI S&P 500 Index Fund Class I	7.57%	8.42%	12.20%	4.10%	10.27%	7.03%	5.78%	4.04%	3.90%	2.08%	4.34%	1.53%

Frequently Asked Questions

Can I hold both SNSAX and SPIIX in my portfolio?

SNSAX and SPIIX have a correlation of 0.53, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SNSAX or SPIIX?

SPIIX has higher volatility (2.83%) compared to SNSAX (0.49%). In terms of maximum drawdown, SNSAX dropped -12.22% vs SPIIX's -55.78%.

Which has better risk-adjusted returns?

SNSAX currently has the higher Sharpe Ratio (3.12 vs 2.44), 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.