INDEX vs. RCKSX

Last updated Jun 24, 2026

INDEX (CYBER HORNET S&P 500) and RCKSX (Rock Oak Core Growth Fund) are both mutual funds - INDEX is a S&P 500 fund tracking the S&P 500 Index, while RCKSX is a Large Cap Blend Equities fund managed by Oak Associates. Over the past 10 years, INDEX returned 13.29%/yr vs 11.43%/yr for RCKSX. Their correlation of 0.85 suggests significant overlap in exposure. INDEX charges 0.25%/yr vs 1.25%/yr for RCKSX.

Performance

INDEX vs. RCKSX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in CYBER HORNET S&P 500 (INDEX) 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, INDEX achieves a 9.65% return, which is significantly lower than RCKSX's 15.47% return. Over the past 10 years, INDEX has outperformed RCKSX with an annualized return of 13.29%, while RCKSX has yielded a comparatively lower 11.43% annualized return.

INDEX

• 1D: -0.37%
• 1M: 0.11%
• YTD: 9.65%
• 6M: 8.70%
• 1Y: 25.41%
• 3Y*: 19.79%
• 5Y*: 11.53%
• 10Y*: 13.29%

RCKSX

• 1D: 0.00%
• 1M: 0.60%
• YTD: 15.47%
• 6M: 13.64%
• 1Y: 20.17%
• 3Y*: 19.37%
• 5Y*: 8.00%
• 10Y*: 11.43%

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

INDEX vs. RCKSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
INDEX CYBER HORNET S&P 500	9.65%	17.77%	24.73%	10.58%	-11.84%	29.10%	12.75%	28.98%	-7.83%	18.70%
RCKSX Rock Oak Core Growth Fund	15.47%	12.99%	15.12%	15.57%	-18.09%	9.96%	13.75%	19.05%	-2.14%	22.69%

Correlation

The correlation between INDEX and RCKSX is 0.61, 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	0.61
Correlation (3Y) Calculated over the trailing 3-year period	0.72
Correlation (5Y) Calculated over the trailing 5-year period	0.83
Correlation (10Y) Calculated over the trailing 10-year period	0.84
Correlation (All Time) Calculated using the full available price history since May 11, 2015	0.85

Over the past year, the correlation between INDEX and RCKSX has dropped to 0.61 - well below their long-term average of 0.85, suggesting their price drivers have been diverging.

Return for Risk

INDEX vs. RCKSX — Risk / Return Rank

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

INDEX

INDEX Risk / Return Rank: 65
INDEX Sharpe Ratio Rank: 63
INDEX Sortino Ratio Rank: 57
INDEX Omega Ratio Rank: 59
INDEX Calmar Ratio Rank: 67
INDEX Martin Ratio Rank: 78

RCKSX

RCKSX Risk / Return Rank: 63
RCKSX Sharpe Ratio Rank: 48
RCKSX Sortino Ratio Rank: 49
RCKSX Omega Ratio Rank: 39
RCKSX Calmar Ratio Rank: 95
RCKSX Martin Ratio Rank: 85

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.

INDEX vs. RCKSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for CYBER HORNET S&P 500 (INDEX) 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.

	INDEX	RCKSX	Difference
Sharpe ratio: Return per unit of total volatility	2.15	1.89	+0.26
Sortino ratio: Return per unit of downside risk	2.91	2.72	+0.19
Omega ratio: Gain probability vs. loss probability	1.39	1.31	+0.08
Calmar ratio: Return relative to maximum drawdown	3.00	5.35	-2.35
Martin ratio: Return relative to average drawdown	13.57	14.75	-1.18

INDEX vs. RCKSX - Sharpe Ratio Comparison

The current INDEX Sharpe Ratio is 2.15, which is comparable to the RCKSX Sharpe Ratio of 1.89. The chart below compares the historical Sharpe Ratios of INDEX 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.

Drawdowns

INDEX vs. RCKSX - Drawdown Comparison

The maximum INDEX drawdown since its inception was -38.82%, smaller than the maximum RCKSX drawdown of -57.88%. Use the drawdown chart below to compare losses from any high point for INDEX and RCKSX.

Drawdown Indicators

	INDEX	RCKSX	Difference
Max Drawdown Largest peak-to-trough decline	-38.82%	-57.88%	+19.06%
Max Drawdown (1Y) Largest decline over 1 year	-8.93%	-4.14%	-4.79%
Max Drawdown (3Y) Largest decline over 3 years	-18.75%	-18.22%	-0.53%
Max Drawdown (5Y) Largest decline over 5 years	-21.52%	-22.54%	+1.02%
Max Drawdown (10Y) Largest decline over 10 years	-38.82%	-33.10%	-5.72%
Current Drawdown Current decline from peak	-1.70%	-0.46%	-1.24%
Average Drawdown Average peak-to-trough decline	-4.62%	-9.48%	+4.86%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.97%	1.50%	+0.47%

Volatility

INDEX vs. RCKSX - Volatility Comparison

CYBER HORNET S&P 500 (INDEX) has a higher volatility of 4.71% compared to Rock Oak Core Growth Fund (RCKSX) at 3.29%. This indicates that INDEX'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.

Volatility by Period

	INDEX	RCKSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.71%	3.29%	+1.42%
Volatility (6M) Calculated over the trailing 6-month period	9.85%	8.07%	+1.78%
Volatility (1Y) Calculated over the trailing 1-year period	12.47%	11.75%	+0.72%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.83%	15.64%	+1.19%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.69%	17.55%	+1.14%

INDEX vs. RCKSX - Expense Ratio Comparison

INDEX has a 0.25% expense ratio, which is lower than RCKSX's 1.25% expense ratio.

Dividends

INDEX vs. RCKSX - Dividend Comparison

INDEX's dividend yield for the trailing twelve months is around 0.95%, less than RCKSX's 5.42% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
INDEX CYBER HORNET S&P 500	0.95%	1.04%	1.97%	1.56%	3.25%	1.81%	1.53%	1.61%	3.09%	1.15%	0.00%	0.00%
RCKSX Rock Oak Core Growth Fund	5.42%	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

Can I hold both INDEX and RCKSX in my portfolio?

INDEX and RCKSX have a correlation of 0.61, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, INDEX or RCKSX?

INDEX has higher volatility (4.71%) compared to RCKSX (3.29%). In terms of maximum drawdown, INDEX dropped -38.82% vs RCKSX's -57.88%.

Which has better risk-adjusted returns?

INDEX currently has the higher Sharpe Ratio (2.15 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.