RYUIX vs. BULIX

Last updated Jun 3, 2026

RYUIX (Rydex Utilities Fund) and BULIX (American Century Utilities Fund) are both Utilities Equities funds. Over the past 10 years, RYUIX returned 7.58%/yr vs 6.68%/yr for BULIX. Their correlation of 0.93 suggests significant overlap in exposure. RYUIX charges 1.39%/yr vs 0.65%/yr for BULIX.

Performance

RYUIX vs. BULIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Rydex Utilities Fund (RYUIX) and American Century Utilities Fund (BULIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with RYUIX having a 2.61% return and BULIX slightly higher at 2.66%. Over the past 10 years, RYUIX has outperformed BULIX with an annualized return of 7.58%, while BULIX has yielded a comparatively lower 6.68% annualized return.

RYUIX

• 1D: -2.63%
• 1M: -5.75%
• YTD: 2.61%
• 6M: 0.57%
• 1Y: 9.40%
• 3Y*: 13.07%
• 5Y*: 8.59%
• 10Y*: 7.58%

BULIX

• 1D: -2.89%
• 1M: -6.79%
• YTD: 2.66%
• 6M: 0.79%
• 1Y: 9.34%
• 3Y*: 14.46%
• 5Y*: 7.93%
• 10Y*: 6.68%

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

RYUIX vs. BULIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RYUIX Rydex Utilities Fund	2.61%	17.90%	20.25%	-6.78%	1.32%	15.08%	-4.56%	19.38%	4.07%	11.36%
BULIX American Century Utilities Fund	2.66%	16.76%	24.32%	-7.51%	-4.37%	13.77%	-2.38%	19.94%	1.82%	0.59%

Correlation

The correlation between RYUIX and BULIX is 0.98 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.98
Correlation (3Y) Calculated over the trailing 3-year period	0.98
Correlation (5Y) Calculated over the trailing 5-year period	0.98
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Jan 3, 2001	0.93

The correlation between RYUIX and BULIX has been stable across timeframes, ranging from 0.93 to 0.98 - a consistent structural relationship.

Return for Risk

RYUIX vs. BULIX — Risk / Return Rank

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

RYUIX

RYUIX Risk / Return Rank: 10
RYUIX Sharpe Ratio Rank: 9
RYUIX Sortino Ratio Rank: 8
RYUIX Omega Ratio Rank: 8
RYUIX Calmar Ratio Rank: 14
RYUIX Martin Ratio Rank: 9

BULIX

BULIX Risk / Return Rank: 9
BULIX Sharpe Ratio Rank: 8
BULIX Sortino Ratio Rank: 8
BULIX Omega Ratio Rank: 8
BULIX Calmar Ratio Rank: 12
BULIX Martin Ratio Rank: 9

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.

RYUIX vs. BULIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Rydex Utilities Fund (RYUIX) and American Century Utilities Fund (BULIX). 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.

	RYUIX	BULIX	Difference
Sharpe ratio Return per unit of total volatility	0.71	0.71	0.00
Sortino ratio Return per unit of downside risk	1.03	1.04	-0.01
Omega ratio Gain probability vs. loss probability	1.13	1.13	0.00
Calmar ratio Return relative to maximum drawdown	1.32	1.20	+0.12
Martin ratio Return relative to average drawdown	2.92	2.99	-0.07
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

RYUIX vs. BULIX - Sharpe Ratio Comparison

The current RYUIX Sharpe Ratio is 0.71, which is comparable to the BULIX Sharpe Ratio of 0.71. The chart below compares the historical Sharpe Ratios of RYUIX and BULIX, 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

	RYUIX	BULIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.71	0.71	0.00
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.52	0.48	+0.04
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.40	0.37	+0.03
Sharpe Ratio (All Time) Calculated using the full available price history	0.27	0.45	-0.18

Drawdowns

RYUIX vs. BULIX - Drawdown Comparison

The maximum RYUIX drawdown since its inception was -63.29%, which is greater than BULIX's maximum drawdown of -55.21%. Use the drawdown chart below to compare losses from any high point for RYUIX and BULIX.

Drawdown Indicators

	RYUIX	BULIX	Difference
Max Drawdown Largest peak-to-trough decline	-63.29%	-55.21%	-8.08%
Max Drawdown (1Y) Largest decline over 1 year	-7.97%	-8.93%	+0.96%
Max Drawdown (3Y) Largest decline over 3 years	-17.03%	-16.54%	-0.49%
Max Drawdown (5Y) Largest decline over 5 years	-24.28%	-24.56%	+0.28%
Max Drawdown (10Y) Largest decline over 10 years	-36.88%	-33.86%	-3.02%
Current Drawdown Current decline from peak	-7.68%	-8.93%	+1.25%
Average Drawdown Average peak-to-trough decline	-14.46%	-10.03%	-4.43%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.59%	3.58%	+0.01%

Volatility

RYUIX vs. BULIX - Volatility Comparison

Rydex Utilities Fund (RYUIX) and American Century Utilities Fund (BULIX) have volatilities of 4.72% and 4.74%, 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

	RYUIX	BULIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.72%	4.74%	-0.02%
Volatility (6M) Calculated over the trailing 6-month period	10.89%	11.03%	-0.14%
Volatility (1Y) Calculated over the trailing 1-year period	13.61%	13.78%	-0.17%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.65%	16.69%	-0.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.93%	18.05%	+0.88%

RYUIX vs. BULIX - Expense Ratio Comparison

RYUIX has a 1.39% expense ratio, which is higher than BULIX's 0.65% expense ratio.

Dividends

RYUIX vs. BULIX - Dividend Comparison

RYUIX's dividend yield for the trailing twelve months is around 1.82%, less than BULIX's 11.11% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BULIX American Century Utilities Fund	11.11%	11.60%	2.36%	2.65%	7.78%	7.50%	7.55%	2.97%	6.91%	7.70%	6.99%	5.87%
RYUIX Rydex Utilities Fund	1.82%	1.87%	0.67%	3.16%	0.81%	2.61%	2.17%	0.91%	0.00%	2.61%	10.04%	1.62%

Frequently Asked Questions

Can I hold both RYUIX and BULIX in my portfolio?

With a correlation of 0.98, RYUIX and BULIX 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, RYUIX or BULIX?

BULIX has higher volatility (4.74%) compared to RYUIX (4.72%). In terms of maximum drawdown, RYUIX dropped -63.29% vs BULIX's -55.21%.

Which has better risk-adjusted returns?

BULIX currently has the higher Sharpe Ratio (0.71 vs 0.71), 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.