MARFX vs. OOSAX

Last updated Jun 4, 2026

MARFX (BlackRock Mid-Cap Value Fund) and OOSAX (Invesco Senior Floating Rate Fund) are both mutual funds - MARFX is a Mid Cap Value Equities fund managed by BlackRock, while OOSAX is a Bank Loan fund managed by Invesco. Over the past 10 years, MARFX returned 11.09%/yr vs 3.63%/yr for OOSAX. At a 0.17 correlation, their price movements are largely independent. MARFX charges 0.74%/yr vs 1.04%/yr for OOSAX.

Performance

MARFX vs. OOSAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BlackRock Mid-Cap Value Fund (MARFX) and Invesco Senior Floating Rate Fund (OOSAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MARFX achieves a 11.39% return, which is significantly higher than OOSAX's -0.83% return. Over the past 10 years, MARFX has outperformed OOSAX with an annualized return of 11.09%, while OOSAX has yielded a comparatively lower 3.63% annualized return.

MARFX

• 1D: 1.11%
• 1M: 6.32%
• YTD: 11.39%
• 6M: 12.61%
• 1Y: 24.24%
• 3Y*: 14.08%
• 5Y*: 8.19%
• 10Y*: 11.09%

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%

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

MARFX vs. OOSAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MARFX BlackRock Mid-Cap Value Fund	11.39%	13.68%	6.71%	12.58%	-4.06%	26.43%	7.21%	29.57%	-9.55%	8.79%
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%

Correlation

The correlation between MARFX and OOSAX is 0.07, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.07
Correlation (3Y) Calculated over the trailing 3-year period	0.17
Correlation (5Y) Calculated over the trailing 5-year period	0.21
Correlation (10Y) Calculated over the trailing 10-year period	0.29
Correlation (All Time) Calculated using the full available price history since Sep 3, 1999	0.17

The correlation between MARFX and OOSAX shifts across timeframes, from 0.07 (1 year) to 0.29 (10 years), reflecting how their relationship changes across market environments.

Return for Risk

MARFX vs. OOSAX — Risk / Return Rank

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

MARFX

MARFX Risk / Return Rank: 47
MARFX Sharpe Ratio Rank: 47
MARFX Sortino Ratio Rank: 47
MARFX Omega Ratio Rank: 41
MARFX Calmar Ratio Rank: 50
MARFX Martin Ratio Rank: 50

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

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.

MARFX vs. OOSAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BlackRock Mid-Cap Value Fund (MARFX) and Invesco Senior Floating Rate Fund (OOSAX). 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.

	MARFX	OOSAX	Difference
Sharpe ratio: Return per unit of total volatility	2.00	0.55	+1.45
Sortino ratio: Return per unit of downside risk	2.88	1.13	+1.75
Omega ratio: Gain probability vs. loss probability	1.35	1.17	+0.18
Calmar ratio: Return relative to maximum drawdown	2.70	0.51	+2.20
Martin ratio: Return relative to average drawdown	10.23	1.13	+9.10
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MARFX vs. OOSAX - Sharpe Ratio Comparison

The current MARFX Sharpe Ratio is 2.00, which is higher than the OOSAX Sharpe Ratio of 0.55. The chart below compares the historical Sharpe Ratios of MARFX and OOSAX, 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

	MARFX	OOSAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.00	0.55	+1.45
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.51	1.39	-0.88
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.59	0.89	-0.31
Sharpe Ratio (All Time) Calculated using the full available price history	0.48	1.30	-0.82

Drawdowns

MARFX vs. OOSAX - Drawdown Comparison

The maximum MARFX drawdown since its inception was -55.39%, which is greater than OOSAX's maximum drawdown of -32.12%. Use the drawdown chart below to compare losses from any high point for MARFX and OOSAX.

Drawdown Indicators

	MARFX	OOSAX	Difference
Max Drawdown Largest peak-to-trough decline	-55.39%	-32.12%	-23.27%
Max Drawdown (1Y) Largest decline over 1 year	-9.50%	-3.23%	-6.27%
Max Drawdown (3Y) Largest decline over 3 years	-20.07%	-3.23%	-16.84%
Max Drawdown (5Y) Largest decline over 5 years	-20.07%	-6.52%	-13.55%
Max Drawdown (10Y) Largest decline over 10 years	-42.09%	-23.53%	-18.56%
Current Drawdown Current decline from peak	0.00%	-1.57%	+1.57%
Average Drawdown Average peak-to-trough decline	-8.01%	-2.15%	-5.86%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.51%	1.37%	+1.14%

Volatility

MARFX vs. OOSAX - Volatility Comparison

BlackRock Mid-Cap Value Fund (MARFX) has a higher volatility of 3.18% compared to Invesco Senior Floating Rate Fund (OOSAX) at 0.86%. This indicates that MARFX's price experiences larger fluctuations and is considered to be riskier than OOSAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MARFX	OOSAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.18%	0.86%	+2.32%
Volatility (6M) Calculated over the trailing 6-month period	9.39%	2.07%	+7.32%
Volatility (1Y) Calculated over the trailing 1-year period	12.86%	2.99%	+9.87%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.07%	3.61%	+12.46%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.00%	4.13%	+14.87%

MARFX vs. OOSAX - Expense Ratio Comparison

MARFX has a 0.74% expense ratio, which is lower than OOSAX's 1.04% expense ratio.

Dividends

MARFX vs. OOSAX - Dividend Comparison

MARFX's dividend yield for the trailing twelve months is around 10.17%, more than OOSAX's 5.18% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MARFX BlackRock Mid-Cap Value Fund	10.17%	11.33%	7.46%	3.70%	4.50%	11.16%	2.13%	3.95%	8.41%	22.19%	5.43%	15.72%
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 MARFX and OOSAX in my portfolio?

MARFX and OOSAX have a correlation of 0.07, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MARFX or OOSAX?

MARFX has higher volatility (3.18%) compared to OOSAX (0.86%). In terms of maximum drawdown, MARFX dropped -55.39% vs OOSAX's -32.12%.

Which has better risk-adjusted returns?

MARFX currently has the higher Sharpe Ratio (2.00 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.