SLGAX vs. RCKSX

Last updated Jun 5, 2026

SLGAX (SEI Institutional Managed Trust Large Cap Fund) and RCKSX (Rock Oak Core Growth Fund) are both Large Cap Blend Equities funds. Over the past 10 years, SLGAX returned 12.98%/yr vs 10.90%/yr for RCKSX. Their correlation of 0.89 suggests significant overlap in exposure. SLGAX charges 0.95%/yr vs 1.25%/yr for RCKSX.

Performance

SLGAX vs. RCKSX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SEI Institutional Managed Trust Large Cap Fund (SLGAX) and Rock Oak Core Growth Fund (RCKSX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SLGAX achieves a 8.85% return, which is significantly lower than RCKSX's 14.59% return. Over the past 10 years, SLGAX has outperformed RCKSX with an annualized return of 12.98%, while RCKSX has yielded a comparatively lower 10.90% annualized return.

SLGAX

• 1D: -0.65%
• 1M: 3.31%
• YTD: 8.85%
• 6M: 9.44%
• 1Y: 24.38%
• 3Y*: 19.91%
• 5Y*: 10.55%
• 10Y*: 12.98%

RCKSX

• 1D: 0.43%
• 1M: 1.47%
• YTD: 14.59%
• 6M: 14.70%
• 1Y: 20.99%
• 3Y*: 19.79%
• 5Y*: 7.32%
• 10Y*: 10.90%

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

SLGAX vs. RCKSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SLGAX SEI Institutional Managed Trust Large Cap Fund	8.85%	17.41%	20.38%	19.49%	-16.03%	24.30%	11.60%	29.13%	-6.92%	22.54%
RCKSX Rock Oak Core Growth Fund	14.59%	12.99%	15.12%	15.57%	-18.09%	9.96%	13.75%	19.05%	-2.14%	22.69%

Correlation

The correlation between SLGAX and RCKSX is 0.73, 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	0.73
Correlation (3Y) Calculated over the trailing 3-year period	0.79
Correlation (5Y) Calculated over the trailing 5-year period	0.86
Correlation (10Y) Calculated over the trailing 10-year period	0.87
Correlation (All Time) Calculated using the full available price history since Oct 2, 2009	0.89

The correlation between SLGAX and RCKSX shifts across timeframes, from 0.73 (1 year) to 0.89 (all time), reflecting how their relationship changes across market environments.

Return for Risk

SLGAX vs. RCKSX — Risk / Return Rank

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

SLGAX

SLGAX Risk / Return Rank: 58
SLGAX Sharpe Ratio Rank: 54
SLGAX Sortino Ratio Rank: 52
SLGAX Omega Ratio Rank: 51
SLGAX Calmar Ratio Rank: 60
SLGAX Martin Ratio Rank: 71

RCKSX

RCKSX Risk / Return Rank: 56
RCKSX Sharpe Ratio Rank: 39
RCKSX Sortino Ratio Rank: 40
RCKSX Omega Ratio Rank: 33
RCKSX Calmar Ratio Rank: 92
RCKSX Martin Ratio Rank: 75

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. RCKSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SEI Institutional Managed Trust Large Cap Fund (SLGAX) and Rock Oak Core Growth Fund (RCKSX). 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.

	SLGAX	RCKSX	Difference
Sharpe ratio: Return per unit of total volatility	2.12	1.80	+0.32
Sortino ratio: Return per unit of downside risk	2.97	2.61	+0.36
Omega ratio: Gain probability vs. loss probability	1.38	1.30	+0.08
Calmar ratio: Return relative to maximum drawdown	2.92	5.02	-2.10
Martin ratio: Return relative to average drawdown	13.23	13.94	-0.70
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SLGAX vs. RCKSX - Sharpe Ratio Comparison

The current SLGAX Sharpe Ratio is 2.12, which is comparable to the RCKSX Sharpe Ratio of 1.80. The chart below compares the historical Sharpe Ratios of SLGAX and RCKSX, 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

	SLGAX	RCKSX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.12	1.80	+0.32
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.54	0.47	+0.07
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.66	0.62	+0.04
Sharpe Ratio (All Time) Calculated using the full available price history	0.68	0.38	+0.30

Drawdowns

SLGAX vs. RCKSX - Drawdown Comparison

The maximum SLGAX drawdown since its inception was -36.80%, smaller than the maximum RCKSX drawdown of -57.88%. Use the drawdown chart below to compare losses from any high point for SLGAX and RCKSX.

Drawdown Indicators

	SLGAX	RCKSX	Difference
Max Drawdown Largest peak-to-trough decline	-36.80%	-57.88%	+21.08%
Max Drawdown (1Y) Largest decline over 1 year	-8.39%	-4.14%	-4.25%
Max Drawdown (3Y) Largest decline over 3 years	-28.89%	-18.22%	-10.67%
Max Drawdown (5Y) Largest decline over 5 years	-28.89%	-22.54%	-6.35%
Max Drawdown (10Y) Largest decline over 10 years	-36.80%	-33.10%	-3.70%
Current Drawdown Current decline from peak	-0.78%	-0.17%	-0.61%
Average Drawdown Average peak-to-trough decline	-4.88%	-9.50%	+4.62%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.85%	1.49%	+0.36%

Volatility

SLGAX vs. RCKSX - Volatility Comparison

SEI Institutional Managed Trust Large Cap Fund (SLGAX) and Rock Oak Core Growth Fund (RCKSX) have volatilities of 2.95% and 2.96%, 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

	SLGAX	RCKSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.95%	2.96%	-0.01%
Volatility (6M) Calculated over the trailing 6-month period	8.78%	7.99%	+0.79%
Volatility (1Y) Calculated over the trailing 1-year period	11.58%	11.56%	+0.02%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.59%	15.66%	+3.93%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.67%	17.54%	+2.13%

SLGAX vs. RCKSX - Expense Ratio Comparison

SLGAX has a 0.95% expense ratio, which is lower than RCKSX's 1.25% expense ratio.

Dividends

SLGAX vs. RCKSX - Dividend Comparison

SLGAX's dividend yield for the trailing twelve months is around 19.25%, more than RCKSX's 5.46% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
RCKSX Rock Oak Core Growth Fund	5.46%	6.26%	0.47%	0.71%	1.00%	4.31%	16.56%	3.18%	0.59%	5.91%	0.70%	3.21%
SLGAX SEI Institutional Managed Trust Large Cap Fund	19.25%	20.96%	18.18%	6.78%	10.41%	14.16%	3.68%	7.27%	16.21%	7.35%	0.94%	20.34%

Frequently Asked Questions

Can I hold both SLGAX and RCKSX in my portfolio?

SLGAX and RCKSX have a correlation of 0.73, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SLGAX or RCKSX?

RCKSX has higher volatility (2.96%) compared to SLGAX (2.95%). In terms of maximum drawdown, SLGAX dropped -36.80% vs RCKSX's -57.88%.

Which has better risk-adjusted returns?

SLGAX currently has the higher Sharpe Ratio (2.12 vs 1.80), 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.