VIIIX vs. KNGLX

Last updated Jun 4, 2026

VIIIX (Vanguard Institutional Index Fund Institutional Plus Shares) and KNGLX (CBOE Vest S&P 500 Dividend Aristocrats Target Income Fund) are both mutual funds - VIIIX is a S&P 500 fund tracking the S&P 500 Index, while KNGLX is a Derivative Income fund tracking the Cboe S&P 500 Dividend Aristocrats Target Income Index Monthly Series. Both are passively managed. Over the past 5 years, VIIIX returned 14.42%/yr vs 3.44%/yr for KNGLX. A 0.76 correlation means they provide meaningful diversification when combined. VIIIX charges 0.02%/yr vs 1.20%/yr for KNGLX.

Performance

VIIIX vs. KNGLX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) and CBOE Vest S&P 500 Dividend Aristocrats Target Income Fund (KNGLX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VIIIX achieves a 11.70% return, which is significantly higher than KNGLX's 2.66% return.

VIIIX

• 1D: 0.13%
• 1M: 5.80%
• YTD: 11.70%
• 6M: 11.74%
• 1Y: 28.99%
• 3Y*: 23.17%
• 5Y*: 14.42%
• 10Y*: 15.74%

KNGLX

• 1D: 0.27%
• 1M: 1.09%
• YTD: 2.66%
• 6M: 2.73%
• 1Y: 7.63%
• 3Y*: 5.89%
• 5Y*: 3.44%
• 10Y*: —

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

VIIIX vs. KNGLX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares	11.70%	17.87%	26.29%	25.79%	-18.14%	28.69%	18.41%	31.48%	-5.20%
KNGLX CBOE Vest S&P 500 Dividend Aristocrats Target Income Fund	2.66%	6.43%	2.91%	6.46%	-7.29%	23.23%	7.08%	26.58%	-4.64%

Correlation

The correlation between VIIIX and KNGLX is 0.45, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.45
Correlation (3Y) Calculated over the trailing 3-year period	0.55
Correlation (5Y) Calculated over the trailing 5-year period	0.70
Correlation (All Time) Calculated using the full available price history since Jan 3, 2018	0.76

Over the past year, the correlation between VIIIX and KNGLX has dropped to 0.45 - well below their long-term average of 0.76, suggesting their price drivers have been diverging.

Return for Risk

VIIIX vs. KNGLX — Risk / Return Rank

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

VIIIX

VIIIX Risk / Return Rank: 73
VIIIX Sharpe Ratio Rank: 76
VIIIX Sortino Ratio Rank: 67
VIIIX Omega Ratio Rank: 67
VIIIX Calmar Ratio Rank: 74
VIIIX Martin Ratio Rank: 83

KNGLX

KNGLX Risk / Return Rank: 9
KNGLX Sharpe Ratio Rank: 9
KNGLX Sortino Ratio Rank: 9
KNGLX Omega Ratio Rank: 8
KNGLX Calmar Ratio Rank: 9
KNGLX Martin Ratio Rank: 8

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.

VIIIX vs. KNGLX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) and CBOE Vest S&P 500 Dividend Aristocrats Target Income Fund (KNGLX). 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.

	VIIIX	KNGLX	Difference
Sharpe ratio: Return per unit of total volatility	2.52	0.74	+1.78
Sortino ratio: Return per unit of downside risk	3.42	1.16	+2.27
Omega ratio: Gain probability vs. loss probability	1.46	1.13	+0.33
Calmar ratio: Return relative to maximum drawdown	3.36	0.89	+2.47
Martin ratio: Return relative to average drawdown	15.69	2.40	+13.30
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VIIIX vs. KNGLX - Sharpe Ratio Comparison

The current VIIIX Sharpe Ratio is 2.52, which is higher than the KNGLX Sharpe Ratio of 0.74. The chart below compares the historical Sharpe Ratios of VIIIX and KNGLX, 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

	VIIIX	KNGLX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.52	0.74	+1.78
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.86	0.25	+0.61
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.87	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.50	0.41	+0.09

Drawdowns

VIIIX vs. KNGLX - Drawdown Comparison

The maximum VIIIX drawdown since its inception was -55.18%, which is greater than KNGLX's maximum drawdown of -31.48%. Use the drawdown chart below to compare losses from any high point for VIIIX and KNGLX.

Drawdown Indicators

	VIIIX	KNGLX	Difference
Max Drawdown Largest peak-to-trough decline	-55.18%	-31.48%	-23.70%
Max Drawdown (1Y) Largest decline over 1 year	-8.90%	-8.90%	0.00%
Max Drawdown (3Y) Largest decline over 3 years	-18.75%	-14.79%	-3.96%
Max Drawdown (5Y) Largest decline over 5 years	-24.50%	-18.25%	-6.25%
Max Drawdown (10Y) Largest decline over 10 years	-33.79%	—	—
Current Drawdown Current decline from peak	0.00%	-5.58%	+5.58%
Average Drawdown Average peak-to-trough decline	-10.02%	-4.62%	-5.40%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.90%	3.27%	-1.37%

Volatility

VIIIX vs. KNGLX - Volatility Comparison

Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) and CBOE Vest S&P 500 Dividend Aristocrats Target Income Fund (KNGLX) have volatilities of 2.83% and 2.78%, 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

	VIIIX	KNGLX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.83%	2.78%	+0.05%
Volatility (6M) Calculated over the trailing 6-month period	8.97%	7.71%	+1.26%
Volatility (1Y) Calculated over the trailing 1-year period	11.86%	10.62%	+1.24%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.89%	14.02%	+2.87%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.06%	17.15%	+0.91%

VIIIX vs. KNGLX - Expense Ratio Comparison

VIIIX has a 0.02% expense ratio, which is lower than KNGLX's 1.20% expense ratio.

Dividends

VIIIX vs. KNGLX - Dividend Comparison

VIIIX's dividend yield for the trailing twelve months is around 2.41%, less than KNGLX's 12.76% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
KNGLX CBOE Vest S&P 500 Dividend Aristocrats Target Income Fund	12.76%	8.02%	9.60%	7.99%	4.54%	4.41%	3.53%	4.53%	4.74%	0.00%	0.00%	0.00%
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares	2.41%	2.11%	3.66%	2.66%	3.39%	4.79%	3.07%	2.86%	2.45%	1.84%	2.38%	2.47%

Frequently Asked Questions

Can I hold both VIIIX and KNGLX in my portfolio?

VIIIX and KNGLX have a correlation of 0.45, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VIIIX or KNGLX?

VIIIX has higher volatility (2.83%) compared to KNGLX (2.78%). In terms of maximum drawdown, VIIIX dropped -55.18% vs KNGLX's -31.48%.

Which has better risk-adjusted returns?

VIIIX currently has the higher Sharpe Ratio (2.52 vs 0.74), 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.