OPOCX vs. VADAX

Last updated Apr 2, 2026

Compare and contrast key facts about Invesco Discovery Fund (OPOCX) and Invesco Equally-Weighted S&P 500 Fund Class A (VADAX).

OPOCX is managed by Invesco. It was launched on Sep 11, 1986. VADAX is managed by Invesco.

Performance

OPOCX vs. VADAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco Discovery Fund (OPOCX) and Invesco Equally-Weighted S&P 500 Fund Class A (VADAX). The values are adjusted to include any dividend payments, if applicable.

OPOCX vs. VADAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OPOCX Invesco Discovery Fund	6.39%	16.77%	22.61%	17.02%	-31.26%	14.78%	50.33%	36.81%	-4.15%	29.04%
VADAX Invesco Equally-Weighted S&P 500 Fund Class A	0.54%	10.89%	12.40%	13.29%	-12.07%	28.93%	12.30%	28.59%	-8.19%	18.26%

Returns By Period

In the year-to-date period, OPOCX achieves a 6.39% return, which is significantly higher than VADAX's 0.54% return. Over the past 10 years, OPOCX has outperformed VADAX with an annualized return of 14.66%, while VADAX has yielded a comparatively lower 10.69% annualized return.

OPOCX

• 1D: 5.36%
• 1M: -6.64%
• YTD: 6.39%
• 6M: 11.96%
• 1Y: 40.33%
• 3Y*: 18.87%
• 5Y*: 5.87%
• 10Y*: 14.66%

VADAX

• 1D: 2.04%
• 1M: -5.84%
• YTD: 0.54%
• 6M: 1.62%
• 1Y: 12.19%
• 3Y*: 11.36%
• 5Y*: 7.44%
• 10Y*: 10.69%

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

OPOCX vs. VADAX - Expense Ratio Comparison

OPOCX has a 1.01% expense ratio, which is higher than VADAX's 0.52% expense ratio.

OPOCX

Invesco Discovery Fund

VADAX

Invesco Equally-Weighted S&P 500 Fund Class A

Return for Risk

OPOCX vs. VADAX — Risk / Return Rank

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

OPOCX

OPOCX Risk / Return Rank: 83
OPOCX Sharpe Ratio Rank: 80
OPOCX Sortino Ratio Rank: 80
OPOCX Omega Ratio Rank: 72
OPOCX Calmar Ratio Rank: 92
OPOCX Martin Ratio Rank: 92

VADAX

VADAX Risk / Return Rank: 31
VADAX Sharpe Ratio Rank: 28
VADAX Sortino Ratio Rank: 30
VADAX Omega Ratio Rank: 29
VADAX Calmar Ratio Rank: 31
VADAX Martin Ratio Rank: 38

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.

OPOCX vs. VADAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco Discovery Fund (OPOCX) and Invesco Equally-Weighted S&P 500 Fund Class A (VADAX). 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.

	OPOCX	VADAX	Difference
Sharpe ratio Return per unit of total volatility	1.53	0.72	+0.81
Sortino ratio Return per unit of downside risk	2.12	1.13	+0.99
Omega ratio Gain probability vs. loss probability	1.29	1.16	+0.13
Calmar ratio Return relative to maximum drawdown	2.84	0.91	+1.92
Martin ratio Return relative to average drawdown	11.39	4.10	+7.29
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OPOCX vs. VADAX - Sharpe Ratio Comparison

The current OPOCX Sharpe Ratio is 1.53, which is higher than the VADAX Sharpe Ratio of 0.72. The chart below compares the historical Sharpe Ratios of OPOCX and VADAX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	OPOCX	VADAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.53	0.72	+0.81
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.23	0.46	-0.23
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.60	0.58	+0.02
Sharpe Ratio (All Time) Calculated using the full available price history	0.49	0.45	+0.04

Correlation

The correlation between OPOCX and VADAX is 0.81, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

OPOCX vs. VADAX - Dividend Comparison

OPOCX's dividend yield for the trailing twelve months is around 12.61%, more than VADAX's 10.15% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OPOCX Invesco Discovery Fund	12.61%	13.41%	6.86%	0.00%	0.00%	20.51%	11.22%	6.42%	18.85%	12.46%	4.33%	6.84%
VADAX Invesco Equally-Weighted S&P 500 Fund Class A	10.15%	10.21%	8.77%	4.69%	8.49%	9.80%	6.21%	4.49%	6.90%	2.76%	0.30%	2.77%

Drawdowns

OPOCX vs. VADAX - Drawdown Comparison

The maximum OPOCX drawdown since its inception was -64.17%, which is greater than VADAX's maximum drawdown of -60.27%. Use the drawdown chart below to compare losses from any high point for OPOCX and VADAX.

Drawdown Indicators

	OPOCX	VADAX	Difference
Max Drawdown Largest peak-to-trough decline	-64.17%	-60.27%	-3.90%
Max Drawdown (1Y) Largest decline over 1 year	-13.39%	-12.61%	-0.78%
Max Drawdown (5Y) Largest decline over 5 years	-43.27%	-21.74%	-21.53%
Max Drawdown (10Y) Largest decline over 10 years	-43.27%	-39.32%	-3.95%
Current Drawdown Current decline from peak	-6.64%	-6.01%	-0.63%
Average Drawdown Average peak-to-trough decline	-18.94%	-7.13%	-11.81%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.33%	2.80%	+0.53%

Volatility

OPOCX vs. VADAX - Volatility Comparison

Invesco Discovery Fund (OPOCX) has a higher volatility of 12.58% compared to Invesco Equally-Weighted S&P 500 Fund Class A (VADAX) at 4.47%. This indicates that OPOCX's price experiences larger fluctuations and is considered to be riskier than VADAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OPOCX	VADAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	12.58%	4.47%	+8.11%
Volatility (6M) Calculated over the trailing 6-month period	19.74%	8.87%	+10.87%
Volatility (1Y) Calculated over the trailing 1-year period	27.27%	17.25%	+10.02%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	25.25%	16.30%	+8.95%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	24.67%	18.54%	+6.13%