SLGAX vs. SSSYX

Last updated Jun 25, 2026

SLGAX (SEI Institutional Managed Trust Large Cap Fund) and SSSYX (State Street Equity 500 Index Fund Class K) are both mutual funds - SLGAX is a Large Cap Blend Equities fund managed by BlackRock, while SSSYX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, SLGAX returned 13.26%/yr vs 45.49%/yr for SSSYX. With a 0.96 correlation, they move nearly in lockstep. SLGAX charges 0.95%/yr vs 0.02%/yr for SSSYX.

Performance

SLGAX vs. SSSYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SEI Institutional Managed Trust Large Cap Fund (SLGAX) and State Street Equity 500 Index Fund Class K (SSSYX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SLGAX achieves a 6.78% return, which is significantly lower than SSSYX's 8.21% return. Over the past 10 years, SLGAX has underperformed SSSYX with an annualized return of 13.26%, while SSSYX has yielded a comparatively higher 45.49% annualized return.

SLGAX

• 1D: -0.66%
• 1M: -1.06%
• YTD: 6.78%
• 6M: 5.33%
• 1Y: 19.76%
• 3Y*: 18.48%
• 5Y*: 10.20%
• 10Y*: 13.26%

SSSYX

• 1D: -1.43%
• 1M: -1.33%
• YTD: 8.21%
• 6M: 6.88%
• 1Y: 22.31%
• 3Y*: 20.78%
• 5Y*: 13.11%
• 10Y*: 45.49%

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

SLGAX vs. SSSYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SLGAX SEI Institutional Managed Trust Large Cap Fund	6.78%	17.41%	20.38%	19.49%	-16.03%	24.30%	11.60%	29.13%	-6.92%	22.54%
SSSYX State Street Equity 500 Index Fund Class K	8.21%	17.81%	24.99%	26.27%	-18.16%	28.51%	1,083.11%	31.38%	-4.38%	21.61%

Correlation

The correlation between SLGAX and SSSYX is 0.94, 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	0.94
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (5Y) Calculated over the trailing 5-year period	0.96
Correlation (10Y) Calculated over the trailing 10-year period	0.96
Correlation (All Time) Calculated using the full available price history since Sep 18, 2014	0.96

The correlation between SLGAX and SSSYX has been stable across timeframes, ranging from 0.94 to 0.96 - a consistent structural relationship.

Return for Risk

SLGAX vs. SSSYX — Risk / Return Rank

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

SLGAX

SLGAX Risk / Return Rank: 52
SLGAX Sharpe Ratio Rank: 49
SLGAX Sortino Ratio Rank: 47
SLGAX Omega Ratio Rank: 46
SLGAX Calmar Ratio Rank: 54
SLGAX Martin Ratio Rank: 65

SSSYX

SSSYX Risk / Return Rank: 52
SSSYX Sharpe Ratio Rank: 49
SSSYX Sortino Ratio Rank: 45
SSSYX Omega Ratio Rank: 47
SSSYX Calmar Ratio Rank: 54
SSSYX Martin Ratio Rank: 66

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.

SLGAX vs. SSSYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SEI Institutional Managed Trust Large Cap Fund (SLGAX) and State Street Equity 500 Index Fund Class K (SSSYX). 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.

	SLGAX	SSSYX	Difference
Sharpe ratio: Return per unit of total volatility	1.78	1.90	-0.12
Sortino ratio: Return per unit of downside risk	2.48	2.58	-0.10
Omega ratio: Gain probability vs. loss probability	1.32	1.34	-0.03
Calmar ratio: Return relative to maximum drawdown	2.54	2.68	-0.14
Martin ratio: Return relative to average drawdown	11.21	12.02	-0.81

SLGAX vs. SSSYX - Sharpe Ratio Comparison

The current SLGAX Sharpe Ratio is 1.78, which is comparable to the SSSYX Sharpe Ratio of 1.90. The chart below compares the historical Sharpe Ratios of SLGAX and SSSYX, 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

SLGAX vs. SSSYX - Drawdown Comparison

The maximum SLGAX drawdown since its inception was -36.80%, which is greater than SSSYX's maximum drawdown of -33.77%. Use the drawdown chart below to compare losses from any high point for SLGAX and SSSYX.

Drawdown Indicators

	SLGAX	SSSYX	Difference
Max Drawdown Largest peak-to-trough decline	-36.80%	-33.77%	-3.03%
Max Drawdown (1Y) Largest decline over 1 year	-8.39%	-8.88%	+0.49%
Max Drawdown (3Y) Largest decline over 3 years	-28.89%	-18.74%	-10.15%
Max Drawdown (5Y) Largest decline over 5 years	-28.89%	-24.49%	-4.40%
Max Drawdown (10Y) Largest decline over 10 years	-36.80%	-33.77%	-3.03%
Current Drawdown Current decline from peak	-2.66%	-3.12%	+0.46%
Average Drawdown Average peak-to-trough decline	-4.87%	-3.91%	-0.96%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.89%	1.97%	-0.08%

Volatility

SLGAX vs. SSSYX - Volatility Comparison

The current volatility for SEI Institutional Managed Trust Large Cap Fund (SLGAX) is 4.20%, while State Street Equity 500 Index Fund Class K (SSSYX) has a volatility of 4.89%. This indicates that SLGAX experiences smaller price fluctuations and is considered to be less risky than SSSYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SLGAX	SSSYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.20%	4.89%	-0.69%
Volatility (6M) Calculated over the trailing 6-month period	9.45%	9.92%	-0.47%
Volatility (1Y) Calculated over the trailing 1-year period	12.03%	12.56%	-0.53%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.65%	16.99%	+2.66%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.66%	121.18%	-101.52%

SLGAX vs. SSSYX - Expense Ratio Comparison

SLGAX has a 0.95% expense ratio, which is higher than SSSYX's 0.02% expense ratio.

Dividends

SLGAX vs. SSSYX - Dividend Comparison

SLGAX's dividend yield for the trailing twelve months is around 19.62%, more than SSSYX's 1.33% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SLGAX SEI Institutional Managed Trust Large Cap Fund	19.62%	20.96%	18.18%	6.78%	10.41%	14.16%	3.68%	7.27%	16.21%	7.35%	0.94%	20.34%
SSSYX State Street Equity 500 Index Fund Class K	1.33%	1.44%	1.63%	1.78%	2.16%	2.76%	1.86%	4.44%	5.18%	5.94%	2.07%	1.84%

Frequently Asked Questions

Can I hold both SLGAX and SSSYX in my portfolio?

With a correlation of 0.94, SLGAX and SSSYX 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, SLGAX or SSSYX?

SSSYX has higher volatility (4.89%) compared to SLGAX (4.20%). In terms of maximum drawdown, SLGAX dropped -36.80% vs SSSYX's -33.77%.

Which has better risk-adjusted returns?

SSSYX currently has the higher Sharpe Ratio (1.90 vs 1.78), 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.