OIGAX vs. PRNHX

Last updated Jun 4, 2026

OIGAX (Invesco Oppenheimer International Growth Fund Class A) and PRNHX (T. Rowe Price New Horizons Fund) are both mutual funds - OIGAX is a Foreign Large Cap Equities fund managed by Invesco, while PRNHX is a Mid Cap Growth Equities fund managed by T. Rowe Price. Over the past 10 years, OIGAX returned 5.81%/yr vs 14.70%/yr for PRNHX. A 0.63 correlation means they provide meaningful diversification when combined. OIGAX charges 1.10%/yr vs 0.75%/yr for PRNHX.

Performance

OIGAX vs. PRNHX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco Oppenheimer International Growth Fund Class A (OIGAX) and T. Rowe Price New Horizons Fund (PRNHX). 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 PRNHX's 15.06% return. Over the past 10 years, OIGAX has underperformed PRNHX with an annualized return of 5.81%, while PRNHX has yielded a comparatively higher 14.70% annualized 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%

PRNHX

• 1D: 1.21%
• 1M: 5.05%
• YTD: 15.06%
• 6M: 12.99%
• 1Y: 27.38%
• 3Y*: 11.94%
• 5Y*: 1.80%
• 10Y*: 14.70%

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

OIGAX vs. PRNHX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OIGAX Invesco Oppenheimer International Growth Fund Class A	3.90%	15.86%	-1.85%	20.93%	-27.31%	10.38%	22.11%	28.62%	-19.53%	26.61%
PRNHX T. Rowe Price New Horizons Fund	15.06%	3.27%	8.80%	21.35%	-36.96%	9.96%	58.05%	56.50%	3.79%	31.59%

Correlation

The correlation between OIGAX and PRNHX is 0.74, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.74
Correlation (3Y) Calculated over the trailing 3-year period	0.71
Correlation (5Y) Calculated over the trailing 5-year period	0.73
Correlation (10Y) Calculated over the trailing 10-year period	0.71
Correlation (All Time) Calculated using the full available price history since Mar 26, 1996	0.63

The correlation between OIGAX and PRNHX shifts across timeframes, from 0.63 (all time) to 0.74 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

OIGAX vs. PRNHX — 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

PRNHX

PRNHX Risk / Return Rank: 30
PRNHX Sharpe Ratio Rank: 28
PRNHX Sortino Ratio Rank: 26
PRNHX Omega Ratio Rank: 25
PRNHX Calmar Ratio Rank: 34
PRNHX Martin Ratio Rank: 40

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. PRNHX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco Oppenheimer International Growth Fund Class A (OIGAX) and T. Rowe Price New Horizons Fund (PRNHX). 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	PRNHX	Difference
Sharpe ratio: Return per unit of total volatility	0.60	1.49	-0.89
Sortino ratio: Return per unit of downside risk	0.95	2.10	-1.16
Omega ratio: Gain probability vs. loss probability	1.11	1.26	-0.14
Calmar ratio: Return relative to maximum drawdown	0.66	2.22	-1.56
Martin ratio: Return relative to average drawdown	2.18	8.57	-6.38
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. PRNHX - Sharpe Ratio Comparison

The current OIGAX Sharpe Ratio is 0.60, which is lower than the PRNHX Sharpe Ratio of 1.49. The chart below compares the historical Sharpe Ratios of OIGAX and PRNHX, 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	PRNHX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.60	1.49	-0.89
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.09	0.07	+0.01
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.32	0.65	-0.33
Sharpe Ratio (All Time) Calculated using the full available price history	0.39	0.49	-0.09

Drawdowns

OIGAX vs. PRNHX - Drawdown Comparison

The maximum OIGAX drawdown since its inception was -67.43%, roughly equal to the maximum PRNHX drawdown of -70.96%. Use the drawdown chart below to compare losses from any high point for OIGAX and PRNHX.

Drawdown Indicators

	OIGAX	PRNHX	Difference
Max Drawdown Largest peak-to-trough decline	-67.43%	-70.96%	+3.53%
Max Drawdown (1Y) Largest decline over 1 year	-14.61%	-13.12%	-1.49%
Max Drawdown (3Y) Largest decline over 3 years	-19.51%	-26.65%	+7.14%
Max Drawdown (5Y) Largest decline over 5 years	-40.41%	-48.37%	+7.96%
Max Drawdown (10Y) Largest decline over 10 years	-40.41%	-48.37%	+7.96%
Current Drawdown Current decline from peak	-1.60%	-11.36%	+9.76%
Average Drawdown Average peak-to-trough decline	-17.31%	-18.38%	+1.07%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.42%	3.39%	+1.03%

Volatility

OIGAX vs. PRNHX - Volatility Comparison

The current volatility for Invesco Oppenheimer International Growth Fund Class A (OIGAX) is 5.76%, while T. Rowe Price New Horizons Fund (PRNHX) has a volatility of 6.75%. This indicates that OIGAX experiences smaller price fluctuations and is considered to be less risky than PRNHX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OIGAX	PRNHX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.76%	6.75%	-0.99%
Volatility (6M) Calculated over the trailing 6-month period	13.37%	15.55%	-2.18%
Volatility (1Y) Calculated over the trailing 1-year period	16.18%	19.51%	-3.33%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.88%	24.58%	-5.70%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.52%	22.83%	-4.31%

OIGAX vs. PRNHX - Expense Ratio Comparison

OIGAX has a 1.10% expense ratio, which is higher than PRNHX's 0.75% expense ratio.

Dividends

OIGAX vs. PRNHX - Dividend Comparison

OIGAX's dividend yield for the trailing twelve months is around 42.39%, more than PRNHX's 10.30% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
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%
PRNHX T. Rowe Price New Horizons Fund	10.30%	11.85%	9.82%	0.00%	4.72%	17.09%	13.67%	23.46%	13.94%	8.27%	5.77%	7.72%

Frequently Asked Questions

Can I hold both OIGAX and PRNHX in my portfolio?

OIGAX and PRNHX have a correlation of 0.74, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OIGAX or PRNHX?

PRNHX has higher volatility (6.75%) compared to OIGAX (5.76%). In terms of maximum drawdown, OIGAX dropped -67.43% vs PRNHX's -70.96%.

Which has better risk-adjusted returns?

PRNHX currently has the higher Sharpe Ratio (1.49 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.