OOSAX vs. MSIGX

Last updated Jun 4, 2026

OOSAX (Invesco Senior Floating Rate Fund) and MSIGX (Invesco Main Street Fund) are both mutual funds - OOSAX is a Bank Loan fund managed by Invesco, while MSIGX is a Large Cap Blend Equities fund managed by Invesco. Over the past 10 years, OOSAX returned 3.63%/yr vs 11.85%/yr for MSIGX. At a 0.15 correlation, their price movements are largely independent. OOSAX charges 1.04%/yr vs 0.82%/yr for MSIGX.

Performance

OOSAX vs. MSIGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco Senior Floating Rate Fund (OOSAX) and Invesco Main Street Fund (MSIGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OOSAX achieves a -0.83% return, which is significantly lower than MSIGX's 6.01% return. Over the past 10 years, OOSAX has underperformed MSIGX with an annualized return of 3.63%, while MSIGX has yielded a comparatively higher 11.85% annualized return.

OOSAX

• 1D: 0.00%
• 1M: 0.14%
• YTD: -0.83%
• 6M: -0.50%
• 1Y: 1.47%
• 3Y*: 5.82%
• 5Y*: 4.91%
• 10Y*: 3.63%

MSIGX

• 1D: 0.03%
• 1M: 3.56%
• YTD: 6.01%
• 6M: 6.04%
• 1Y: 20.28%
• 3Y*: 18.12%
• 5Y*: 10.75%
• 10Y*: 11.85%

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

OOSAX vs. MSIGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OOSAX Invesco Senior Floating Rate Fund	-0.83%	3.78%	7.76%	10.67%	-0.94%	8.66%	-4.46%	2.36%	-0.86%	3.79%
MSIGX Invesco Main Street Fund	6.01%	16.02%	23.66%	23.06%	-20.21%	27.37%	14.41%	22.49%	-8.25%	16.79%

Correlation

The correlation between OOSAX and MSIGX is 0.14, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.14
Correlation (3Y) Calculated over the trailing 3-year period	0.23
Correlation (5Y) Calculated over the trailing 5-year period	0.22
Correlation (10Y) Calculated over the trailing 10-year period	0.27
Correlation (All Time) Calculated using the full available price history since Sep 3, 1999	0.15

The correlation between OOSAX and MSIGX shifts across timeframes, from 0.14 (1 year) to 0.27 (10 years), reflecting how their relationship changes across market environments.

Return for Risk

OOSAX vs. MSIGX — Risk / Return Rank

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

OOSAX

OOSAX Risk / Return Rank: 7
OOSAX Sharpe Ratio Rank: 7
OOSAX Sortino Ratio Rank: 9
OOSAX Omega Ratio Rank: 11
OOSAX Calmar Ratio Rank: 5
OOSAX Martin Ratio Rank: 5

MSIGX

MSIGX Risk / Return Rank: 41
MSIGX Sharpe Ratio Rank: 43
MSIGX Sortino Ratio Rank: 44
MSIGX Omega Ratio Rank: 42
MSIGX Calmar Ratio Rank: 32
MSIGX Martin Ratio Rank: 41

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.

OOSAX vs. MSIGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco Senior Floating Rate Fund (OOSAX) and Invesco Main Street Fund (MSIGX). 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.

	OOSAX	MSIGX	Difference
Sharpe ratio: Return per unit of total volatility	0.55	1.92	-1.38
Sortino ratio: Return per unit of downside risk	1.13	2.78	-1.65
Omega ratio: Gain probability vs. loss probability	1.17	1.35	-0.19
Calmar ratio: Return relative to maximum drawdown	0.51	2.13	-1.63
Martin ratio: Return relative to average drawdown	1.13	8.73	-7.60
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OOSAX vs. MSIGX - Sharpe Ratio Comparison

The current OOSAX Sharpe Ratio is 0.55, which is lower than the MSIGX Sharpe Ratio of 1.92. The chart below compares the historical Sharpe Ratios of OOSAX and MSIGX, 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

	OOSAX	MSIGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.55	1.92	-1.38
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	1.39	0.65	+0.74
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.89	0.67	+0.22
Sharpe Ratio (All Time) Calculated using the full available price history	1.30	0.65	+0.65

Drawdowns

OOSAX vs. MSIGX - Drawdown Comparison

The maximum OOSAX drawdown since its inception was -32.12%, smaller than the maximum MSIGX drawdown of -57.22%. Use the drawdown chart below to compare losses from any high point for OOSAX and MSIGX.

Drawdown Indicators

	OOSAX	MSIGX	Difference
Max Drawdown Largest peak-to-trough decline	-32.12%	-57.22%	+25.10%
Max Drawdown (1Y) Largest decline over 1 year	-3.23%	-10.96%	+7.73%
Max Drawdown (3Y) Largest decline over 3 years	-3.23%	-19.91%	+16.68%
Max Drawdown (5Y) Largest decline over 5 years	-6.52%	-26.73%	+20.21%
Max Drawdown (10Y) Largest decline over 10 years	-23.53%	-35.41%	+11.88%
Current Drawdown Current decline from peak	-1.57%	-0.39%	-1.18%
Average Drawdown Average peak-to-trough decline	-2.15%	-8.99%	+6.84%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.37%	2.56%	-1.19%

Volatility

OOSAX vs. MSIGX - Volatility Comparison

The current volatility for Invesco Senior Floating Rate Fund (OOSAX) is 0.86%, while Invesco Main Street Fund (MSIGX) has a volatility of 2.66%. This indicates that OOSAX experiences smaller price fluctuations and is considered to be less risky than MSIGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OOSAX	MSIGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.86%	2.66%	-1.80%
Volatility (6M) Calculated over the trailing 6-month period	2.07%	9.78%	-7.71%
Volatility (1Y) Calculated over the trailing 1-year period	2.99%	12.16%	-9.17%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.61%	16.90%	-13.29%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.13%	17.89%	-13.76%

OOSAX vs. MSIGX - Expense Ratio Comparison

OOSAX has a 1.04% expense ratio, which is higher than MSIGX's 0.82% expense ratio.

Dividends

OOSAX vs. MSIGX - Dividend Comparison

OOSAX's dividend yield for the trailing twelve months is around 5.18%, less than MSIGX's 7.07% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MSIGX Invesco Main Street Fund	7.07%	7.50%	6.06%	7.40%	4.68%	19.19%	3.17%	0.89%	19.62%	7.50%	2.96%	13.79%
OOSAX Invesco Senior Floating Rate Fund	5.18%	6.68%	8.38%	7.76%	7.42%	4.37%	4.84%	5.24%	4.65%	4.08%	4.78%	4.65%

Frequently Asked Questions

Can I hold both OOSAX and MSIGX in my portfolio?

OOSAX and MSIGX have a correlation of 0.14, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OOSAX or MSIGX?

MSIGX has higher volatility (2.66%) compared to OOSAX (0.86%). In terms of maximum drawdown, OOSAX dropped -32.12% vs MSIGX's -57.22%.

Which has better risk-adjusted returns?

MSIGX currently has the higher Sharpe Ratio (1.92 vs 0.55), 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.