BULIX vs. RYUIX

Last updated Jun 4, 2026

BULIX (American Century Utilities Fund) and RYUIX (Rydex Utilities Fund) are both Utilities Equities funds. Over the past 10 years, BULIX returned 6.86%/yr vs 7.78%/yr for RYUIX. Their correlation of 0.93 suggests significant overlap in exposure. BULIX charges 0.65%/yr vs 1.39%/yr for RYUIX.

Performance

BULIX vs. RYUIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Utilities Fund (BULIX) and Rydex Utilities Fund (RYUIX). 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 BULIX having a 4.40% return and RYUIX slightly higher at 4.57%. Over the past 10 years, BULIX has underperformed RYUIX with an annualized return of 6.86%, while RYUIX has yielded a comparatively higher 7.78% annualized return.

BULIX

• 1D: 1.70%
• 1M: -5.06%
• YTD: 4.40%
• 6M: 2.91%
• 1Y: 10.79%
• 3Y*: 15.11%
• 5Y*: 8.21%
• 10Y*: 6.86%

RYUIX

• 1D: 1.91%
• 1M: -3.60%
• YTD: 4.57%
• 6M: 2.75%
• 1Y: 11.26%
• 3Y*: 13.79%
• 5Y*: 8.85%
• 10Y*: 7.78%

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

BULIX vs. RYUIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BULIX American Century Utilities Fund	4.40%	16.76%	24.32%	-7.51%	-4.37%	13.77%	-2.38%	19.94%	1.82%	0.59%
RYUIX Rydex Utilities Fund	4.57%	17.90%	20.25%	-6.78%	1.32%	15.08%	-4.56%	19.38%	4.07%	11.36%

Correlation

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

Return for Risk

BULIX vs. RYUIX — Risk / Return Rank

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

BULIX

BULIX Risk / Return Rank: 11
BULIX Sharpe Ratio Rank: 10
BULIX Sortino Ratio Rank: 9
BULIX Omega Ratio Rank: 10
BULIX Calmar Ratio Rank: 13
BULIX Martin Ratio Rank: 10

RYUIX

RYUIX Risk / Return Rank: 12
RYUIX Sharpe Ratio Rank: 11
RYUIX Sortino Ratio Rank: 10
RYUIX Omega Ratio Rank: 10
RYUIX Calmar Ratio Rank: 16
RYUIX Martin Ratio Rank: 11

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.

BULIX vs. RYUIX - Risk-Adjusted Trends Comparison

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

	BULIX	RYUIX	Difference
Sharpe ratio: Return per unit of total volatility	0.81	0.84	-0.03
Sortino ratio: Return per unit of downside risk	1.17	1.20	-0.03
Omega ratio: Gain probability vs. loss probability	1.15	1.15	0.00
Calmar ratio: Return relative to maximum drawdown	1.26	1.45	-0.19
Martin ratio: Return relative to average drawdown	3.11	3.19	-0.08
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BULIX vs. RYUIX - Sharpe Ratio Comparison

The current BULIX Sharpe Ratio is 0.81, which is comparable to the RYUIX Sharpe Ratio of 0.84. The chart below compares the historical Sharpe Ratios of BULIX and RYUIX, 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

	BULIX	RYUIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.81	0.84	-0.03
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.49	0.53	-0.04
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.38	0.41	-0.03
Sharpe Ratio (All Time) Calculated using the full available price history	0.45	0.27	+0.18

Drawdowns

BULIX vs. RYUIX - Drawdown Comparison

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

Drawdown Indicators

	BULIX	RYUIX	Difference
Max Drawdown Largest peak-to-trough decline	-55.21%	-63.29%	+8.08%
Max Drawdown (1Y) Largest decline over 1 year	-8.93%	-7.97%	-0.96%
Max Drawdown (3Y) Largest decline over 3 years	-16.54%	-17.03%	+0.49%
Max Drawdown (5Y) Largest decline over 5 years	-24.56%	-24.28%	-0.28%
Max Drawdown (10Y) Largest decline over 10 years	-33.86%	-36.88%	+3.02%
Current Drawdown Current decline from peak	-7.38%	-5.92%	-1.46%
Average Drawdown Average peak-to-trough decline	-10.03%	-14.45%	+4.42%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.61%	3.61%	0.00%

Volatility

BULIX vs. RYUIX - Volatility Comparison

American Century Utilities Fund (BULIX) and Rydex Utilities Fund (RYUIX) have volatilities of 5.15% and 5.19%, 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

	BULIX	RYUIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.15%	5.19%	-0.04%
Volatility (6M) Calculated over the trailing 6-month period	11.14%	11.04%	+0.10%
Volatility (1Y) Calculated over the trailing 1-year period	13.85%	13.71%	+0.14%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.71%	16.67%	+0.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.05%	18.94%	-0.89%

BULIX vs. RYUIX - Expense Ratio Comparison

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

Dividends

BULIX vs. RYUIX - Dividend Comparison

BULIX's dividend yield for the trailing twelve months is around 10.93%, more than RYUIX's 1.79% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BULIX American Century Utilities Fund	10.93%	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	1.79%	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 BULIX and RYUIX in my portfolio?

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

RYUIX has higher volatility (5.19%) compared to BULIX (5.15%). In terms of maximum drawdown, BULIX dropped -55.21% vs RYUIX's -63.29%.

Which has better risk-adjusted returns?

RYUIX currently has the higher Sharpe Ratio (0.84 vs 0.81), 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.