MFSCX vs. MIY

Last updated Jun 4, 2026

MFSCX (MFS South Carolina Municipal Bond Fund) and MIY (BlackRock MuniYield Michigan Quality Fund) are both Municipal Bonds funds. Over the past 10 years, MFSCX returned 1.66%/yr vs 2.39%/yr for MIY. At a 0.27 correlation, their price movements are largely independent. MFSCX charges 0.84%/yr vs 2.25%/yr for MIY.

Performance

MFSCX vs. MIY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS South Carolina Municipal Bond Fund (MFSCX) and BlackRock MuniYield Michigan Quality Fund (MIY). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MFSCX achieves a 2.00% return, which is significantly lower than MIY's 5.14% return. Over the past 10 years, MFSCX has underperformed MIY with an annualized return of 1.66%, while MIY has yielded a comparatively higher 2.39% annualized return.

MFSCX

• 1D: 0.18%
• 1M: 0.93%
• YTD: 2.00%
• 6M: 2.30%
• 1Y: 8.14%
• 3Y*: 3.80%
• 5Y*: 0.46%
• 10Y*: 1.66%

MIY

• 1D: -0.66%
• 1M: 0.54%
• YTD: 5.14%
• 6M: 5.36%
• 1Y: 13.47%
• 3Y*: 9.00%
• 5Y*: -0.12%
• 10Y*: 2.39%

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

MFSCX vs. MIY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MFSCX MFS South Carolina Municipal Bond Fund	2.00%	4.22%	1.97%	5.59%	-11.11%	1.77%	4.03%	6.75%	1.03%	4.33%
MIY BlackRock MuniYield Michigan Quality Fund	5.14%	11.24%	3.48%	6.60%	-24.10%	10.04%	7.27%	19.51%	-6.71%	8.86%

Correlation

The correlation between MFSCX and MIY is 0.32, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.32
Correlation (3Y) Calculated over the trailing 3-year period	0.47
Correlation (5Y) Calculated over the trailing 5-year period	0.43
Correlation (10Y) Calculated over the trailing 10-year period	0.37
Correlation (All Time) Calculated using the full available price history since Oct 28, 1994	0.27

The correlation between MFSCX and MIY shifts across timeframes, from 0.27 (all time) to 0.47 (3 years), reflecting how their relationship changes across market environments.

Return for Risk

MFSCX vs. MIY — Risk / Return Rank

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

MFSCX

MFSCX Risk / Return Rank: 65
MFSCX Sharpe Ratio Rank: 70
MFSCX Sortino Ratio Rank: 81
MFSCX Omega Ratio Rank: 85
MFSCX Calmar Ratio Rank: 46
MFSCX Martin Ratio Rank: 41

MIY

MIY Risk / Return Rank: 17
MIY Sharpe Ratio Rank: 17
MIY Sortino Ratio Rank: 18
MIY Omega Ratio Rank: 20
MIY Calmar Ratio Rank: 15
MIY Martin Ratio Rank: 15

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.

MFSCX vs. MIY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS South Carolina Municipal Bond Fund (MFSCX) and BlackRock MuniYield Michigan Quality Fund (MIY). 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.

	MFSCX	MIY	Difference
Sharpe ratio Return per unit of total volatility	2.45	1.16	+1.29
Sortino ratio Return per unit of downside risk	3.86	1.79	+2.07
Omega ratio Gain probability vs. loss probability	1.59	1.23	+0.35
Calmar ratio Return relative to maximum drawdown	2.59	1.34	+1.25
Martin ratio Return relative to average drawdown	8.75	4.27	+4.47
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MFSCX vs. MIY - Sharpe Ratio Comparison

The current MFSCX Sharpe Ratio is 2.45, which is higher than the MIY Sharpe Ratio of 1.16. The chart below compares the historical Sharpe Ratios of MFSCX and MIY, 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

	MFSCX	MIY	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.45	1.16	+1.29
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.10	-0.01	+0.11
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.40	0.20	+0.20
Sharpe Ratio (All Time) Calculated using the full available price history	1.09	0.37	+0.72

Drawdowns

MFSCX vs. MIY - Drawdown Comparison

The maximum MFSCX drawdown since its inception was -16.34%, smaller than the maximum MIY drawdown of -42.19%. Use the drawdown chart below to compare losses from any high point for MFSCX and MIY.

Drawdown Indicators

	MFSCX	MIY	Difference
Max Drawdown Largest peak-to-trough decline	-16.34%	-42.19%	+25.85%
Max Drawdown (1Y) Largest decline over 1 year	-3.11%	-10.08%	+6.97%
Max Drawdown (3Y) Largest decline over 3 years	-7.51%	-14.72%	+7.21%
Max Drawdown (5Y) Largest decline over 5 years	-16.34%	-34.59%	+18.25%
Max Drawdown (10Y) Largest decline over 10 years	-16.34%	-34.59%	+18.25%
Current Drawdown Current decline from peak	-0.19%	-4.35%	+4.16%
Average Drawdown Average peak-to-trough decline	-2.19%	-8.32%	+6.13%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.92%	3.16%	-2.24%

Volatility

MFSCX vs. MIY - Volatility Comparison

The current volatility for MFS South Carolina Municipal Bond Fund (MFSCX) is 1.23%, while BlackRock MuniYield Michigan Quality Fund (MIY) has a volatility of 2.28%. This indicates that MFSCX experiences smaller price fluctuations and is considered to be less risky than MIY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MFSCX	MIY	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.23%	2.28%	-1.05%
Volatility (6M) Calculated over the trailing 6-month period	2.47%	10.32%	-7.85%
Volatility (1Y) Calculated over the trailing 1-year period	3.31%	11.69%	-8.38%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.52%	11.67%	-7.15%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.15%	11.95%	-7.80%

MFSCX vs. MIY - Expense Ratio Comparison

MFSCX has a 0.84% expense ratio, which is lower than MIY's 2.25% expense ratio.

Dividends

MFSCX vs. MIY - Dividend Comparison

MFSCX's dividend yield for the trailing twelve months is around 3.45%, less than MIY's 5.42% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MFSCX MFS South Carolina Municipal Bond Fund	3.45%	4.42%	2.86%	2.31%	1.61%	1.60%	2.20%	3.00%	3.13%	3.06%	3.16%	3.19%
MIY BlackRock MuniYield Michigan Quality Fund	5.42%	5.57%	5.21%	3.86%	5.70%	4.38%	4.23%	4.27%	5.27%	5.46%	5.85%	5.66%

Frequently Asked Questions

Can I hold both MFSCX and MIY in my portfolio?

MFSCX and MIY have a correlation of 0.32, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MFSCX or MIY?

MIY has higher volatility (2.28%) compared to MFSCX (1.23%). In terms of maximum drawdown, MFSCX dropped -16.34% vs MIY's -42.19%.

Which has better risk-adjusted returns?

MFSCX currently has the higher Sharpe Ratio (2.45 vs 1.16), 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.