MASPX vs. BMSLX

Last updated Jun 4, 2026

MASPX (BlackRock Advantage SMID Cap Fund, Inc.) and BMSLX (MFS Blended Research Mid Cap Equity Fund) are both Mid Cap Blend Equities funds. Over the past 5 years, MASPX returned 9.46%/yr vs 10.72%/yr for BMSLX. Their correlation of 0.93 suggests significant overlap in exposure. MASPX charges 0.48%/yr vs 0.59%/yr for BMSLX.

Performance

MASPX vs. BMSLX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BlackRock Advantage SMID Cap Fund, Inc. (MASPX) and MFS Blended Research Mid Cap Equity Fund (BMSLX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MASPX achieves a 21.36% return, which is significantly higher than BMSLX's 13.91% return.

MASPX

• 1D: 1.15%
• 1M: 4.84%
• YTD: 21.36%
• 6M: 21.56%
• 1Y: 38.34%
• 3Y*: 20.38%
• 5Y*: 9.46%
• 10Y*: 12.31%

BMSLX

• 1D: 0.78%
• 1M: 5.44%
• YTD: 13.91%
• 6M: 13.69%
• 1Y: 21.65%
• 3Y*: 18.96%
• 5Y*: 10.72%
• 10Y*: —

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

MASPX vs. BMSLX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MASPX BlackRock Advantage SMID Cap Fund, Inc.	21.36%	11.36%	12.11%	18.89%	-15.73%	13.56%	19.79%	28.86%	-6.52%	8.80%
BMSLX MFS Blended Research Mid Cap Equity Fund	13.91%	8.08%	19.25%	19.81%	-13.70%	26.54%	10.44%	30.21%	-11.11%	18.04%

Correlation

The correlation between MASPX and BMSLX is 0.90, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.90
Correlation (3Y) Calculated over the trailing 3-year period	0.93
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (All Time) Calculated using the full available price history since Aug 24, 2016	0.93

The correlation between MASPX and BMSLX has been stable across timeframes, ranging from 0.90 to 0.95 - a consistent structural relationship.

Return for Risk

MASPX vs. BMSLX — Risk / Return Rank

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

MASPX

MASPX Risk / Return Rank: 71
MASPX Sharpe Ratio Rank: 63
MASPX Sortino Ratio Rank: 58
MASPX Omega Ratio Rank: 52
MASPX Calmar Ratio Rank: 91
MASPX Martin Ratio Rank: 89

BMSLX

BMSLX Risk / Return Rank: 36
BMSLX Sharpe Ratio Rank: 32
BMSLX Sortino Ratio Rank: 33
BMSLX Omega Ratio Rank: 31
BMSLX Calmar Ratio Rank: 44
BMSLX 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.

MASPX vs. BMSLX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BlackRock Advantage SMID Cap Fund, Inc. (MASPX) and MFS Blended Research Mid Cap Equity Fund (BMSLX). 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.

	MASPX	BMSLX	Difference
Sharpe ratio: Return per unit of total volatility	2.35	1.60	+0.74
Sortino ratio: Return per unit of downside risk	3.21	2.37	+0.84
Omega ratio: Gain probability vs. loss probability	1.40	1.29	+0.11
Calmar ratio: Return relative to maximum drawdown	4.80	2.50	+2.30
Martin ratio: Return relative to average drawdown	17.83	8.56	+9.28
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MASPX vs. BMSLX - Sharpe Ratio Comparison

The current MASPX Sharpe Ratio is 2.35, which is higher than the BMSLX Sharpe Ratio of 1.60. The chart below compares the historical Sharpe Ratios of MASPX and BMSLX, 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

	MASPX	BMSLX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.35	1.60	+0.74
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.45	0.58	-0.13
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.59	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.62	0.60	+0.02

Drawdowns

MASPX vs. BMSLX - Drawdown Comparison

The maximum MASPX drawdown since its inception was -63.74%, which is greater than BMSLX's maximum drawdown of -41.06%. Use the drawdown chart below to compare losses from any high point for MASPX and BMSLX.

Drawdown Indicators

	MASPX	BMSLX	Difference
Max Drawdown Largest peak-to-trough decline	-63.74%	-41.06%	-22.68%
Max Drawdown (1Y) Largest decline over 1 year	-8.38%	-9.17%	+0.79%
Max Drawdown (3Y) Largest decline over 3 years	-25.41%	-22.28%	-3.13%
Max Drawdown (5Y) Largest decline over 5 years	-26.87%	-22.28%	-4.59%
Max Drawdown (10Y) Largest decline over 10 years	-34.82%	—	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-9.86%	-5.05%	-4.81%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.25%	2.68%	-0.43%

Volatility

MASPX vs. BMSLX - Volatility Comparison

BlackRock Advantage SMID Cap Fund, Inc. (MASPX) has a higher volatility of 5.03% compared to MFS Blended Research Mid Cap Equity Fund (BMSLX) at 3.75%. This indicates that MASPX's price experiences larger fluctuations and is considered to be riskier than BMSLX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MASPX	BMSLX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.03%	3.75%	+1.28%
Volatility (6M) Calculated over the trailing 6-month period	12.65%	10.74%	+1.91%
Volatility (1Y) Calculated over the trailing 1-year period	17.13%	14.31%	+2.82%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.16%	18.43%	+2.73%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.94%	19.73%	+1.21%

MASPX vs. BMSLX - Expense Ratio Comparison

MASPX has a 0.48% expense ratio, which is lower than BMSLX's 0.59% expense ratio.

Dividends

MASPX vs. BMSLX - Dividend Comparison

MASPX's dividend yield for the trailing twelve months is around 4.20%, more than BMSLX's 2.71% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BMSLX MFS Blended Research Mid Cap Equity Fund	2.71%	3.08%	10.98%	2.32%	5.15%	23.06%	0.94%	4.90%	8.27%	2.63%	0.47%	0.00%
MASPX BlackRock Advantage SMID Cap Fund, Inc.	4.20%	5.09%	1.41%	0.95%	2.04%	40.63%	4.79%	2.73%	27.75%	16.25%	3.40%	3.26%

Frequently Asked Questions

Can I hold both MASPX and BMSLX in my portfolio?

MASPX and BMSLX have a correlation of 0.90, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MASPX or BMSLX?

MASPX has higher volatility (5.03%) compared to BMSLX (3.75%). In terms of maximum drawdown, MASPX dropped -63.74% vs BMSLX's -41.06%.

Which has better risk-adjusted returns?

MASPX currently has the higher Sharpe Ratio (2.35 vs 1.60), 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.