ACSTX vs. MIGYX

Last updated Jun 24, 2026

ACSTX (Invesco Comstock Fund) and MIGYX (Invesco Main Street Fund Class Y) are both mutual funds - ACSTX is a Large Cap Value Equities fund managed by Invesco, while MIGYX is a Large Cap Blend Equities fund actively managed by Invesco. Over the past 10 years, ACSTX returned 13.17%/yr vs 12.31%/yr for MIGYX. Their correlation of 0.85 suggests significant overlap in exposure. ACSTX charges 0.80%/yr vs 0.56%/yr for MIGYX.

Performance

ACSTX vs. MIGYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco Comstock Fund (ACSTX) and Invesco Main Street Fund Class Y (MIGYX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ACSTX achieves a 10.38% return, which is significantly higher than MIGYX's 5.43% return. Over the past 10 years, ACSTX has outperformed MIGYX with an annualized return of 13.17%, while MIGYX has yielded a comparatively lower 12.31% annualized return.

ACSTX

• 1D: 0.45%
• 1M: 0.95%
• YTD: 10.38%
• 6M: 9.91%
• 1Y: 22.73%
• 3Y*: 18.22%
• 5Y*: 12.90%
• 10Y*: 13.17%

MIGYX

• 1D: -0.64%
• 1M: 0.14%
• YTD: 5.43%
• 6M: 4.55%
• 1Y: 18.14%
• 3Y*: 17.83%
• 5Y*: 10.76%
• 10Y*: 12.31%

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

ACSTX vs. MIGYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ACSTX Invesco Comstock Fund	10.38%	17.22%	15.00%	12.37%	0.74%	33.33%	-0.78%	24.35%	-12.34%	17.75%
MIGYX Invesco Main Street Fund Class Y	5.43%	16.31%	23.93%	23.33%	-20.02%	27.65%	14.68%	22.67%	-8.04%	17.04%

Correlation

The correlation between ACSTX and MIGYX is 0.54, 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	0.54
Correlation (3Y) Calculated over the trailing 3-year period	0.69
Correlation (5Y) Calculated over the trailing 5-year period	0.77
Correlation (10Y) Calculated over the trailing 10-year period	0.77
Correlation (All Time) Calculated using the full available price history since Oct 31, 1996	0.85

Over the past year, the correlation between ACSTX and MIGYX has dropped to 0.54 - well below their long-term average of 0.85, suggesting their price drivers have been diverging.

Return for Risk

ACSTX vs. MIGYX — Risk / Return Rank

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

ACSTX

ACSTX Risk / Return Rank: 63
ACSTX Sharpe Ratio Rank: 64
ACSTX Sortino Ratio Rank: 67
ACSTX Omega Ratio Rank: 58
ACSTX Calmar Ratio Rank: 65
ACSTX Martin Ratio Rank: 60

MIGYX

MIGYX Risk / Return Rank: 37
MIGYX Sharpe Ratio Rank: 39
MIGYX Sortino Ratio Rank: 39
MIGYX Omega Ratio Rank: 38
MIGYX Calmar Ratio Rank: 31
MIGYX Martin Ratio Rank: 39

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.

ACSTX vs. MIGYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco Comstock Fund (ACSTX) and Invesco Main Street Fund Class Y (MIGYX). 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.

	ACSTX	MIGYX	Difference
Sharpe ratio: Return per unit of total volatility	2.16	1.67	+0.49
Sortino ratio: Return per unit of downside risk	3.11	2.41	+0.70
Omega ratio: Gain probability vs. loss probability	1.39	1.30	+0.08
Calmar ratio: Return relative to maximum drawdown	2.97	1.98	+0.99
Martin ratio: Return relative to average drawdown	11.28	8.03	+3.24

ACSTX vs. MIGYX - Sharpe Ratio Comparison

The current ACSTX Sharpe Ratio is 2.16, which is comparable to the MIGYX Sharpe Ratio of 1.67. The chart below compares the historical Sharpe Ratios of ACSTX and MIGYX, 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

ACSTX vs. MIGYX - Drawdown Comparison

The maximum ACSTX drawdown since its inception was -58.61%, roughly equal to the maximum MIGYX drawdown of -56.98%. Use the drawdown chart below to compare losses from any high point for ACSTX and MIGYX.

Drawdown Indicators

	ACSTX	MIGYX	Difference
Max Drawdown Largest peak-to-trough decline	-58.61%	-56.98%	-1.63%
Max Drawdown (1Y) Largest decline over 1 year	-8.02%	-10.87%	+2.85%
Max Drawdown (3Y) Largest decline over 3 years	-15.61%	-19.88%	+4.27%
Max Drawdown (5Y) Largest decline over 5 years	-17.25%	-26.59%	+9.34%
Max Drawdown (10Y) Largest decline over 10 years	-44.80%	-35.48%	-9.32%
Current Drawdown Current decline from peak	-0.79%	-1.27%	+0.48%
Average Drawdown Average peak-to-trough decline	-9.34%	-10.59%	+1.25%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.11%	2.56%	-0.45%

Volatility

ACSTX vs. MIGYX - Volatility Comparison

The current volatility for Invesco Comstock Fund (ACSTX) is 3.28%, while Invesco Main Street Fund Class Y (MIGYX) has a volatility of 4.63%. This indicates that ACSTX experiences smaller price fluctuations and is considered to be less risky than MIGYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ACSTX	MIGYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.28%	4.63%	-1.35%
Volatility (6M) Calculated over the trailing 6-month period	8.24%	10.12%	-1.88%
Volatility (1Y) Calculated over the trailing 1-year period	11.08%	12.92%	-1.84%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.36%	17.01%	-1.65%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.46%	17.95%	+1.51%

ACSTX vs. MIGYX - Expense Ratio Comparison

ACSTX has a 0.80% expense ratio, which is higher than MIGYX's 0.56% expense ratio.

Dividends

ACSTX vs. MIGYX - Dividend Comparison

ACSTX's dividend yield for the trailing twelve months is around 8.01%, more than MIGYX's 7.41% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ACSTX Invesco Comstock Fund	8.01%	8.79%	10.17%	8.44%	13.00%	8.66%	2.05%	6.66%	10.03%	3.60%	6.98%	1.10%
MIGYX Invesco Main Street Fund Class Y	7.41%	7.82%	6.36%	7.51%	5.01%	19.63%	3.23%	0.98%	20.13%	7.80%	3.22%	14.18%

Frequently Asked Questions

Can I hold both ACSTX and MIGYX in my portfolio?

ACSTX and MIGYX have a correlation of 0.54, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ACSTX or MIGYX?

MIGYX has higher volatility (4.63%) compared to ACSTX (3.28%). In terms of maximum drawdown, ACSTX dropped -58.61% vs MIGYX's -56.98%.

Which has better risk-adjusted returns?

ACSTX currently has the higher Sharpe Ratio (2.16 vs 1.67), 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.