OIGAX vs. FZILX

Last updated Jun 4, 2026

OIGAX (Invesco Oppenheimer International Growth Fund Class A) and FZILX (Fidelity ZERO International Index Fund) are both Foreign Large Cap Equities funds. Over the past 5 years, OIGAX returned 1.65%/yr vs 9.43%/yr for FZILX. Their correlation of 0.91 suggests significant overlap in exposure. OIGAX charges 1.10%/yr vs 0.00%/yr for FZILX.

Performance

OIGAX vs. FZILX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco Oppenheimer International Growth Fund Class A (OIGAX) and Fidelity ZERO International Index Fund (FZILX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OIGAX achieves a 3.90% return, which is significantly lower than FZILX's 16.29% return.

OIGAX

• 1D: 0.49%
• 1M: 6.14%
• YTD: 3.90%
• 6M: 4.66%
• 1Y: 9.89%
• 3Y*: 7.76%
• 5Y*: 1.65%
• 10Y*: 5.81%

FZILX

• 1D: 0.71%
• 1M: 6.20%
• YTD: 16.29%
• 6M: 19.11%
• 1Y: 34.60%
• 3Y*: 20.62%
• 5Y*: 9.43%
• 10Y*: —

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

OIGAX vs. FZILX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
OIGAX Invesco Oppenheimer International Growth Fund Class A	3.90%	15.86%	-1.85%	20.93%	-27.31%	10.38%	22.11%	28.62%	-14.67%
FZILX Fidelity ZERO International Index Fund	16.29%	33.52%	5.32%	16.28%	-15.96%	8.19%	11.06%	21.69%	-9.38%

Correlation

The correlation between OIGAX and FZILX is 0.93, 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	0.93
Correlation (3Y) Calculated over the trailing 3-year period	0.90
Correlation (5Y) Calculated over the trailing 5-year period	0.91
Correlation (All Time) Calculated using the full available price history since Aug 17, 2018	0.91

The correlation between OIGAX and FZILX has been stable across timeframes, ranging from 0.90 to 0.93 - a consistent structural relationship.

Return for Risk

OIGAX vs. FZILX — Risk / Return Rank

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

OIGAX

OIGAX Risk / Return Rank: 7
OIGAX Sharpe Ratio Rank: 7
OIGAX Sortino Ratio Rank: 7
OIGAX Omega Ratio Rank: 7
OIGAX Calmar Ratio Rank: 7
OIGAX Martin Ratio Rank: 7

FZILX

FZILX Risk / Return Rank: 60
FZILX Sharpe Ratio Rank: 64
FZILX Sortino Ratio Rank: 57
FZILX Omega Ratio Rank: 60
FZILX Calmar Ratio Rank: 62
FZILX Martin Ratio Rank: 60

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.

OIGAX vs. FZILX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco Oppenheimer International Growth Fund Class A (OIGAX) and Fidelity ZERO International Index Fund (FZILX). 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.

	OIGAX	FZILX	Difference
Sharpe ratio: Return per unit of total volatility	0.60	2.34	-1.74
Sortino ratio: Return per unit of downside risk	0.95	3.18	-2.23
Omega ratio: Gain probability vs. loss probability	1.11	1.43	-0.32
Calmar ratio: Return relative to maximum drawdown	0.66	3.04	-2.37
Martin ratio: Return relative to average drawdown	2.18	11.91	-9.72
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OIGAX vs. FZILX - Sharpe Ratio Comparison

The current OIGAX Sharpe Ratio is 0.60, which is lower than the FZILX Sharpe Ratio of 2.34. The chart below compares the historical Sharpe Ratios of OIGAX and FZILX, 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

	OIGAX	FZILX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.60	2.34	-1.74
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.09	0.61	-0.52
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.32	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.39	0.59	-0.20

Drawdowns

OIGAX vs. FZILX - Drawdown Comparison

The maximum OIGAX drawdown since its inception was -67.43%, which is greater than FZILX's maximum drawdown of -34.37%. Use the drawdown chart below to compare losses from any high point for OIGAX and FZILX.

Drawdown Indicators

	OIGAX	FZILX	Difference
Max Drawdown Largest peak-to-trough decline	-67.43%	-34.37%	-33.06%
Max Drawdown (1Y) Largest decline over 1 year	-14.61%	-11.24%	-3.37%
Max Drawdown (3Y) Largest decline over 3 years	-19.51%	-13.47%	-6.04%
Max Drawdown (5Y) Largest decline over 5 years	-40.41%	-29.87%	-10.54%
Max Drawdown (10Y) Largest decline over 10 years	-40.41%	—	—
Current Drawdown Current decline from peak	-1.60%	0.00%	-1.60%
Average Drawdown Average peak-to-trough decline	-17.31%	-6.69%	-10.62%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.42%	2.86%	+1.56%

Volatility

OIGAX vs. FZILX - Volatility Comparison

Invesco Oppenheimer International Growth Fund Class A (OIGAX) has a higher volatility of 5.76% compared to Fidelity ZERO International Index Fund (FZILX) at 4.96%. This indicates that OIGAX's price experiences larger fluctuations and is considered to be riskier than FZILX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OIGAX	FZILX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.76%	4.96%	+0.80%
Volatility (6M) Calculated over the trailing 6-month period	13.37%	12.26%	+1.11%
Volatility (1Y) Calculated over the trailing 1-year period	16.18%	14.62%	+1.56%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.88%	15.52%	+3.36%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.52%	17.32%	+1.20%

OIGAX vs. FZILX - Expense Ratio Comparison

OIGAX has a 1.10% expense ratio, which is higher than FZILX's 0.00% expense ratio.

Dividends

OIGAX vs. FZILX - Dividend Comparison

OIGAX's dividend yield for the trailing twelve months is around 42.39%, more than FZILX's 2.30% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FZILX Fidelity ZERO International Index Fund	2.30%	2.67%	3.00%	2.98%	2.71%	2.61%	1.64%	2.37%	0.02%	0.00%	0.00%	0.00%
OIGAX Invesco Oppenheimer International Growth Fund Class A	42.39%	44.04%	11.27%	11.59%	0.00%	13.52%	14.72%	0.84%	1.08%	0.59%	1.02%	0.87%

Frequently Asked Questions

Can I hold both OIGAX and FZILX in my portfolio?

With a correlation of 0.93, OIGAX and FZILX 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, OIGAX or FZILX?

OIGAX has higher volatility (5.76%) compared to FZILX (4.96%). In terms of maximum drawdown, OIGAX dropped -67.43% vs FZILX's -34.37%.

Which has better risk-adjusted returns?

FZILX currently has the higher Sharpe Ratio (2.34 vs 0.60), 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.