BGEIX vs. AULDX

Last updated Aug 2, 2026

BGEIX (American Century Global Gold Fund) and AULDX (American Century Ultra Fund Class R6) are both mutual funds - BGEIX is a Gold fund managed by American Century, while AULDX is a Large Cap Growth Equities fund actively managed by American Century. Over the past 10 years, BGEIX returned 10.13%/yr vs 17.05%/yr for AULDX. Their 0.18 correlation means their historical movements had little consistent relationship. BGEIX charges 0.65%/yr vs 0.52%/yr for AULDX.

Performance

BGEIX vs. AULDX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Global Gold Fund (BGEIX) and American Century Ultra Fund Class R6 (AULDX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BGEIX achieves a -11.13% return, which is significantly lower than AULDX's 0.01% return. Over the past 10 years, BGEIX has underperformed AULDX with an annualized return of 10.13%, while AULDX has yielded a comparatively higher 17.05% annualized return.

BGEIX

• 1D: 3.47%
• 1M: -2.24%
• 6M: -19.57%
• YTD: -11.13%
• 1Y: 48.85%
• 3Y*: 38.61%
• 5Y*: 18.36%
• 10Y*: 10.13%
• ALL TIME*: 5.11%

AULDX

• 1D: 2.43%
• 1M: -3.68%
• 6M: 0.52%
• YTD: 0.01%
• 1Y: 10.15%
• 3Y*: 15.92%
• 5Y*: 8.71%
• 10Y*: 17.05%
• ALL TIME*: 15.19%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
AULDX American Century Ultra Fund Class R6	$0.00	$0.00	$0.00
BGEIX American Century Global Gold Fund	$0.00	$0.00	$0.00

BGEIX vs. AULDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BGEIX American Century Global Gold Fund	-11.13%	158.45%	15.10%	7.52%	-12.54%	-8.85%	18.92%	37.82%	-7.43%	10.62%
AULDX American Century Ultra Fund Class R6	0.01%	13.05%	29.99%	43.86%	-32.15%	23.89%	50.31%	35.23%	1.04%	32.36%

Correlation

The correlation between BGEIX and AULDX is 0.38, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.38
Correlation (3Y) Balances recent behavior with more history.	0.24
Correlation (5Y) Shows whether the relationship held over a longer period.	0.26
Correlation (10Y) Provides a long-term view across more market conditions.	0.21
Correlation (All Time) Calculated using the full available price history since Jan 2, 2014	0.18

Over the past year, BGEIX and AULDX have become more correlated (0.38) than their long-term average of 0.18, meaning their price movements have been converging.

Return for Risk

BGEIX vs. AULDX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

BGEIX

BGEIX Risk / Return Rank: 32
BGEIX Sharpe Ratio Rank: 37
BGEIX Sortino Ratio Rank: 34
BGEIX Omega Ratio Rank: 38
BGEIX Calmar Ratio Rank: 30
BGEIX Martin Ratio Rank: 21

AULDX

AULDX Risk / Return Rank: 11
AULDX Sharpe Ratio Rank: 11
AULDX Sortino Ratio Rank: 11
AULDX Omega Ratio Rank: 10
AULDX Calmar Ratio Rank: 10
AULDX Martin Ratio Rank: 11

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

BGEIX vs. AULDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century Global Gold Fund (BGEIX) and American Century Ultra Fund Class R6 (AULDX). 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.

	BGEIX	AULDX	Difference
Sharpe ratio: Return per unit of total volatility	1.11	0.41	+0.70
Sortino ratio: Return per unit of downside risk	1.55	0.68	+0.87
Omega ratio: Gain probability vs. loss probability	1.21	1.08	+0.13
Calmar ratio: Return relative to maximum drawdown	1.30	0.48	+0.83
Martin ratio: Return relative to average drawdown	2.88	1.45	+1.43

BGEIX vs. AULDX - Sharpe Ratio Comparison

The current BGEIX Sharpe Ratio is 1.11, which is higher than the AULDX Sharpe Ratio of 0.41. The chart below compares the historical Sharpe Ratios of BGEIX and AULDX, 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

BGEIX vs. AULDX - Drawdown Comparison

The maximum BGEIX drawdown since its inception was -78.69%, which is greater than AULDX's maximum drawdown of -35.03%. Use the drawdown chart below to compare losses from any high point for BGEIX and AULDX.

Drawdown Indicators

	BGEIX	AULDX	Difference
Max Drawdown Largest peak-to-trough decline	-78.69%	-35.03%	-43.66%
Max Drawdown (1Y) Largest decline over 1 year	-38.61%	-15.60%	-23.01%
Max Drawdown (3Y) Largest decline over 3 years	-38.61%	-24.78%	-13.83%
Max Drawdown (5Y) Largest decline over 5 years	-46.62%	-35.03%	-11.59%
Max Drawdown (10Y) Largest decline over 10 years	-51.92%	-35.03%	-16.89%
Current Drawdown Current decline from peak	-33.63%	-9.29%	-24.34%
Average Drawdown Average peak-to-trough decline	-35.14%	-6.18%	-28.96%
Ulcer Index Depth and duration of drawdowns from previous peaks	17.45%	5.10%	+12.35%

Volatility

BGEIX vs. AULDX - Volatility Comparison

American Century Global Gold Fund (BGEIX) has a higher volatility of 11.67% compared to American Century Ultra Fund Class R6 (AULDX) at 5.49%. This indicates that BGEIX's price experiences larger fluctuations and is considered to be riskier than AULDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BGEIX	AULDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	11.67%	5.49%	+6.18%
Volatility (6M) Calculated over the trailing 6-month period	37.64%	14.30%	+23.34%
Volatility (1Y) Calculated over the trailing 1-year period	45.61%	18.15%	+27.46%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	34.42%	22.82%	+11.60%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	33.49%	22.18%	+11.31%

BGEIX vs. AULDX - Expense Ratio Comparison

BGEIX has a 0.65% expense ratio, which is higher than AULDX's 0.52% expense ratio.

Dividends

BGEIX vs. AULDX - Dividend Comparison

BGEIX's dividend yield for the trailing twelve months is around 0.91%, less than AULDX's 10.60% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AULDX American Century Ultra Fund Class R6	10.60%	10.60%	3.32%	5.68%	6.97%	6.42%	2.67%	4.18%	7.94%	6.19%	4.45%	5.06%
BGEIX American Century Global Gold Fund	0.91%	0.85%	1.36%	1.56%	1.38%	2.13%	0.56%	0.87%	0.00%	0.00%	10.56%	0.00%

Frequently Asked Questions

Can I hold both BGEIX and AULDX in my portfolio?

BGEIX and AULDX have a correlation of 0.38, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BGEIX or AULDX?

BGEIX has higher volatility (11.67%) compared to AULDX (5.49%). In terms of maximum drawdown, BGEIX dropped -78.69% vs AULDX's -35.03%.

Which has better risk-adjusted returns?

BGEIX currently has the higher Sharpe Ratio (1.11 vs 0.41), 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.