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MSTQX vs. RCKSX
Performance
Return for Risk
Drawdowns
Volatility
Dividends

MSTQX vs. RCKSX

Last updated Jun 26, 2026

MSTQX (Morningstar U.S. Equity Fund) and RCKSX (Rock Oak Core Growth Fund) are both Large Cap Blend Equities funds. Over the past 5 years, MSTQX returned 5.33%/yr vs 7.69%/yr for RCKSX. Their correlation of 0.82 suggests significant overlap in exposure. MSTQX charges 0.85%/yr vs 1.25%/yr for RCKSX.

Performance

MSTQX vs. RCKSX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Morningstar U.S. Equity Fund (MSTQX) and Rock Oak Core Growth Fund (RCKSX). The values are adjusted to include any dividend payments, if applicable.

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Returns By Period

In the year-to-date period, MSTQX achieves a 3.60% return, which is significantly lower than RCKSX's 16.11% return.

MSTQX

1D
0.16%
1M
-1.75%
YTD
3.60%
6M
2.33%
1Y
-5.07%
3Y*
9.03%
5Y*
5.33%
10Y*
—

RCKSX

1D
0.51%
1M
1.28%
YTD
16.11%
6M
14.01%
1Y
21.58%
3Y*
19.59%
5Y*
7.69%
10Y*
11.49%
*Multi-year figures are annualized to reflect compound growth (CAGR)

MSTQX vs. RCKSX - Yearly Performance Comparison

2026 (YTD)20252024202320222021202020192018
MSTQX
Morningstar U.S. Equity Fund		3.60%-5.56%18.94%25.24%-16.29%26.15%10.49%26.02%-10.45%
RCKSX
Rock Oak Core Growth Fund		16.11%12.99%15.12%15.57%-18.09%9.96%13.75%19.05%-11.23%

Correlation

The correlation between MSTQX and RCKSX is 0.54, 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

0.54

Correlation (3Y)
Calculated over the trailing 3-year period

0.69

Correlation (5Y)
Calculated over the trailing 5-year period

0.80

Correlation (All Time)
Calculated using the full available price history since Nov 5, 2018

0.82

Over the past year, the correlation between MSTQX and RCKSX has dropped to 0.54 - well below their long-term average of 0.82, suggesting their price drivers have been diverging.

Compare stocks, funds, or ETFs

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Morningstar U.S. Equity Fund

Rock Oak Core Growth Fund

Often compared with MSTQX:
MSTQX vs. ICVTMSTQX vs. VOOMSTQX vs. MSTSXMSTQX vs. MSTVXMSTQX vs. MSTBXMSTQX vs. MSCIMSTQX vs. MSTFX
Often compared with RCKSX:
RCKSX vs. LOGSXRCKSX vs. LMISXRCKSX vs. SWPPXRCKSX vs. RIVSXRCKSX vs. FSKAXRCKSX vs. PRBLXRCKSX vs. BOGSX

Return for Risk

MSTQX vs. RCKSX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
MSTQX
MSTQX Risk / Return Rank: 22
Overall Rank
MSTQX Sharpe Ratio Rank: 22
Sharpe Ratio Rank
MSTQX Sortino Ratio Rank: 22
Sortino Ratio Rank
MSTQX Omega Ratio Rank: 22
Omega Ratio Rank
MSTQX Calmar Ratio Rank: 22
Calmar Ratio Rank
MSTQX Martin Ratio Rank: 22
Martin Ratio Rank
RCKSX
RCKSX Risk / Return Rank: 6666
Overall Rank
RCKSX Sharpe Ratio Rank: 5252
Sharpe Ratio Rank
RCKSX Sortino Ratio Rank: 5454
Sortino Ratio Rank
RCKSX Omega Ratio Rank: 4242
Omega Ratio Rank
RCKSX Calmar Ratio Rank: 9595
Calmar Ratio Rank
RCKSX Martin Ratio Rank: 8686
Martin Ratio Rank
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.

MSTQX vs. RCKSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Morningstar U.S. Equity Fund (MSTQX) 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.

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.

MSTQXRCKSXDifference
Sharpe ratioReturn per unit of total volatility
-0.32
1.75

-2.07

Sortino ratioReturn per unit of downside risk
-0.25
2.52

-2.77

Omega ratioGain probability vs. loss probability

0.95

1.29

-0.34

Calmar ratioReturn relative to maximum drawdown

-0.30

4.91

-5.21

Martin ratioReturn relative to average drawdown

-0.60

13.57

-14.17

MSTQX vs. RCKSX - Sharpe Ratio Comparison

The current MSTQX Sharpe Ratio is -0.32, which is lower than the RCKSX Sharpe Ratio of 1.75. The chart below compares the historical Sharpe Ratios of MSTQX 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.

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Drawdowns

MSTQX vs. RCKSX - Drawdown Comparison

The maximum MSTQX drawdown since its inception was -36.23%, smaller than the maximum RCKSX drawdown of -57.88%. Use the drawdown chart below to compare losses from any high point for MSTQX and RCKSX.

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Drawdown Indicators

MSTQXRCKSXDifference

Max Drawdown

Largest peak-to-trough decline

-36.23%

-57.88%

+21.65%

Max Drawdown (1Y)

Largest decline over 1 year

-21.58%

-4.14%

-17.44%

Max Drawdown (3Y)

Largest decline over 3 years

-21.58%

-18.22%

-3.36%

Max Drawdown (5Y)

Largest decline over 5 years

-23.61%

-22.54%

-1.07%

Max Drawdown (10Y)

Largest decline over 10 years

—

-33.10%

—

Current Drawdown

Current decline from peak

-13.62%

0.00%

-13.62%

Average Drawdown

Average peak-to-trough decline

-6.29%

-9.48%

+3.19%

Ulcer Index

Depth and duration of drawdowns from previous peaks

9.82%

1.50%

+8.32%

Volatility

MSTQX vs. RCKSX - Volatility Comparison

Morningstar U.S. Equity Fund (MSTQX) has a higher volatility of 3.93% compared to Rock Oak Core Growth Fund (RCKSX) at 3.14%. This indicates that MSTQX's price experiences larger fluctuations and is considered to be riskier than RCKSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

MSTQXRCKSXDifference

Volatility (1M)

Calculated over the trailing 1-month period

3.93%

3.14%

+0.79%

Volatility (6M)

Calculated over the trailing 6-month period

18.39%

8.03%

+10.36%

Volatility (1Y)

Calculated over the trailing 1-year period

20.24%

11.64%

+8.60%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

18.63%

15.64%

+2.99%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

20.67%

17.49%

+3.18%

MSTQX vs. RCKSX - Expense Ratio Comparison

MSTQX has a 0.85% expense ratio, which is lower than RCKSX's 1.25% expense ratio.

Dividends

MSTQX vs. RCKSX - Dividend Comparison

MSTQX's dividend yield for the trailing twelve months is around 0.66%, less than RCKSX's 5.39% yield.

PositionTTM20252024202320222021202020192018201720162015
MSTQX
Morningstar U.S. Equity Fund		0.66%0.69%10.80%4.21%9.79%15.98%2.15%2.04%0.17%0.00%0.00%0.00%
RCKSX
Rock Oak Core Growth Fund		5.39%6.26%0.47%0.71%1.00%4.31%16.56%3.18%0.59%5.91%0.70%3.21%

Frequently Asked Questions

MSTQX and RCKSX have a correlation of 0.54, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

MSTQX has higher volatility (3.93%) compared to RCKSX (3.14%). In terms of maximum drawdown, MSTQX dropped -36.23% vs RCKSX's -57.88%.

RCKSX currently has the higher Sharpe Ratio (1.75 vs -0.32), 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.

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