OPGSX vs. BGEIX

Last updated Jun 4, 2026

OPGSX (Invesco Gold & Special Minerals Fund) and BGEIX (American Century Global Gold Fund) are both Precious Metals funds. Over the past 10 years, OPGSX returned 15.19%/yr vs 13.90%/yr for BGEIX. Their correlation of 0.93 suggests significant overlap in exposure. OPGSX charges 1.05%/yr vs 0.65%/yr for BGEIX.

Performance

OPGSX vs. BGEIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco Gold & Special Minerals Fund (OPGSX) and American Century Global Gold Fund (BGEIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OPGSX achieves a 3.54% return, which is significantly higher than BGEIX's 2.13% return. Over the past 10 years, OPGSX has outperformed BGEIX with an annualized return of 15.19%, while BGEIX has yielded a comparatively lower 13.90% annualized return.

OPGSX

• 1D: 1.33%
• 1M: 1.97%
• YTD: 3.54%
• 6M: 10.42%
• 1Y: 57.81%
• 3Y*: 38.46%
• 5Y*: 16.13%
• 10Y*: 15.19%

BGEIX

• 1D: 1.25%
• 1M: 1.87%
• YTD: 2.13%
• 6M: 9.50%
• 1Y: 65.37%
• 3Y*: 44.25%
• 5Y*: 19.48%
• 10Y*: 13.90%

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

OPGSX vs. BGEIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OPGSX Invesco Gold & Special Minerals Fund	3.54%	131.03%	13.05%	6.35%	-16.86%	-2.75%	36.15%	46.37%	-13.15%	17.17%
BGEIX American Century Global Gold Fund	2.13%	158.45%	15.10%	7.52%	-12.54%	-8.85%	18.92%	37.82%	-7.43%	10.62%

Correlation

The correlation between OPGSX and BGEIX is 0.90, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.90
Correlation (3Y) Calculated over the trailing 3-year period	0.93
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Aug 18, 1988	0.93

The correlation between OPGSX and BGEIX has been stable across timeframes, ranging from 0.90 to 0.95 - a consistent structural relationship.

Return for Risk

OPGSX vs. BGEIX — Risk / Return Rank

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

OPGSX

OPGSX Risk / Return Rank: 28
OPGSX Sharpe Ratio Rank: 29
OPGSX Sortino Ratio Rank: 22
OPGSX Omega Ratio Rank: 27
OPGSX Calmar Ratio Rank: 36
OPGSX Martin Ratio Rank: 23

BGEIX

BGEIX Risk / Return Rank: 26
BGEIX Sharpe Ratio Rank: 29
BGEIX Sortino Ratio Rank: 21
BGEIX Omega Ratio Rank: 27
BGEIX Calmar Ratio Rank: 32
BGEIX Martin Ratio Rank: 22

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.

OPGSX vs. BGEIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco Gold & Special Minerals Fund (OPGSX) and American Century Global Gold Fund (BGEIX). 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.

	OPGSX	BGEIX	Difference
Sharpe ratio: Return per unit of total volatility	1.54	1.54	0.00
Sortino ratio: Return per unit of downside risk	1.98	1.93	+0.05
Omega ratio: Gain probability vs. loss probability	1.27	1.27	0.00
Calmar ratio: Return relative to maximum drawdown	2.28	2.14	+0.15
Martin ratio: Return relative to average drawdown	5.89	5.64	+0.25
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OPGSX vs. BGEIX - Sharpe Ratio Comparison

The current OPGSX Sharpe Ratio is 1.54, which is comparable to the BGEIX Sharpe Ratio of 1.54. The chart below compares the historical Sharpe Ratios of OPGSX and BGEIX, 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

	OPGSX	BGEIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.54	1.54	0.00
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.49	0.58	-0.09
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.47	0.42	+0.05
Sharpe Ratio (All Time) Calculated using the full available price history	0.26	0.16	+0.09

Drawdowns

OPGSX vs. BGEIX - Drawdown Comparison

The maximum OPGSX drawdown since its inception was -80.04%, roughly equal to the maximum BGEIX drawdown of -78.69%. Use the drawdown chart below to compare losses from any high point for OPGSX and BGEIX.

Drawdown Indicators

	OPGSX	BGEIX	Difference
Max Drawdown Largest peak-to-trough decline	-80.04%	-78.69%	-1.35%
Max Drawdown (1Y) Largest decline over 1 year	-29.01%	-30.55%	+1.54%
Max Drawdown (3Y) Largest decline over 3 years	-29.01%	-30.55%	+1.54%
Max Drawdown (5Y) Largest decline over 5 years	-47.09%	-46.62%	-0.47%
Max Drawdown (10Y) Largest decline over 10 years	-47.09%	-51.92%	+4.83%
Current Drawdown Current decline from peak	-22.32%	-23.73%	+1.41%
Average Drawdown Average peak-to-trough decline	-29.29%	-35.16%	+5.87%
Ulcer Index Depth and duration of drawdowns from previous peaks	10.74%	11.54%	-0.80%

Volatility

OPGSX vs. BGEIX - Volatility Comparison

Invesco Gold & Special Minerals Fund (OPGSX) and American Century Global Gold Fund (BGEIX) have volatilities of 13.17% and 13.85%, 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

	OPGSX	BGEIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	13.17%	13.85%	-0.68%
Volatility (6M) Calculated over the trailing 6-month period	35.90%	34.97%	+0.93%
Volatility (1Y) Calculated over the trailing 1-year period	43.24%	42.70%	+0.54%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	33.57%	33.61%	-0.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	32.88%	33.25%	-0.37%

OPGSX vs. BGEIX - Expense Ratio Comparison

OPGSX has a 1.05% expense ratio, which is higher than BGEIX's 0.65% expense ratio.

Dividends

OPGSX vs. BGEIX - Dividend Comparison

OPGSX's dividend yield for the trailing twelve months is around 0.41%, less than BGEIX's 0.83% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
BGEIX American Century Global Gold Fund	0.83%	0.85%	1.36%	1.56%	1.38%	2.13%	0.56%	0.87%	0.00%	0.00%	10.56%
OPGSX Invesco Gold & Special Minerals Fund	0.41%	0.43%	0.86%	0.81%	0.45%	3.56%	1.55%	0.29%	0.00%	2.78%	7.21%

Frequently Asked Questions

Can I hold both OPGSX and BGEIX in my portfolio?

With a correlation of 0.90, OPGSX and BGEIX 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, OPGSX or BGEIX?

BGEIX has higher volatility (13.85%) compared to OPGSX (13.17%). In terms of maximum drawdown, OPGSX dropped -80.04% vs BGEIX's -78.69%.

Which has better risk-adjusted returns?

OPGSX currently has the higher Sharpe Ratio (1.54 vs 1.54), 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.