Fixed Income

MPLMX

BlackRock Short Duration Muni Fund

  • NAV as of Dec 03, 2025 $10.00
    52 WK: 9.69 - 10.05
  • 1 Day NAV Change as of Dec 03, 2025 $0.01 (0.10%)
  • NAV Total Return as of Dec 04, 2025 YTD: 4.93%
  • Morningstar Rating

Overview

About this Fund

  • Seeks to provide tax-free income consistent with capital preservation
  • Diversified, short-term focus, high-quality portfolio makes this a core short duration holding
  • Experienced team focused on market analysis and credit research, using a relative value approach with an emphasis on security selection, yield curve, and sector rotation

Investment Approach

Invests primarily in investment grade municipal bonds or notes, including variable rate demand obligations that have a maturity of less than ten years, while maintaining a duration of four years or less, as it seeks a high level of income exempt from federal income taxes.
Loading

Performance

Performance

  1y 3y 5y 10y
Total Return (%) 4.01 4.48 1.89 1.53
Benchmark (%) 3.22 3.77 1.33 1.63
BBG Muni National Short 0-3 Years 3.08 3.51 1.48 -
Morningstar Category Avg. (%) 3.07 3.76 1.52 1.53
Morningstar Ranking 1/226 27/213 36/197 79/155
Morningstar Quartile 1 1 1 2
Lipper Category Avg. (%) 3.11 3.68 1.56 1.41
Lipper Ranking 1/139 6/128 27/115 34/84
Lipper Quartile 1 1 1 2
  YTD 1m 3m 1y 3y 5y 10y
Total Return (%) 4.37 0.91 2.13 4.01 14.04 9.79 16.43
Benchmark (%) 3.63 0.17 1.53 3.22 11.74 6.82 17.52
Morningstar Category Avg. (%) 3.19 0.50 1.47 3.07 11.70 7.86 16.40
Lipper Category Avg. (%) 3.07 0.37 1.30 3.11 11.45 8.04 15.08
BBG Muni National Short 0-3 Years 3.14 0.09 1.18 3.08 10.92 7.62 -
  2020 2021 2022 2023 2024
Total Return (%) 1.41 -0.08 -2.44 4.53 2.94
Benchmark (%) 4.95 0.36 -3.17 3.58 2.07
Morningstar Category Avg. (%) 2.28 0.22 -2.64 3.70 2.59
BBG Muni National Short 0-3 Years 2.15 0.32 -2.00 3.34 2.53

Performance is shown after deduction of ongoing charges. Any entry and exit charges are excluded from the calculation.

The performance quoted represents past performance and does not guarantee future results. Investment return and principal value of an investment will fluctuate so that an investor's shares, when sold or redeemed, may be worth more or less than the original cost. Current performance may be lower or higher than the performance quoted.

The returns for Class K Shares prior to September 1, 2015 reflects the performance of the share class when it was classified as BlackRock Shares.

Effective October 1, 2021, the Bloomberg Municipal 1-5 Year Index and a customized index comprised of the Bloomberg National Short 0-3 year maturities, excluding non-investment grade (the “Short-Term Customized Reference Benchmark”) replaced the S&P® Municipal Bond Index and the S&P® Limited Maturity Municipal Bond Index as the performance benchmarks against which the Fund measures its performance.

See the Fund’s prospectus for more details.

Click here for historical distribution data and here for upcoming distribution estimates

Key Facts

Key Facts

Size of Fund (Millions)
as of Dec 03, 2025
$480.2 M
Share Class launch date
Oct 02, 2006
Benchmark Index
BBG Municipal Bond 1-5Yr Index (USD)
Lipper Classification
Short Muni Debt Funds
Max Offer Price
as of Dec 03, 2025
$10.00
Turnover Percent in the Annual Report
as of Jun 30, 2025
66%
Size of Class (Millions)
as of Dec 03, 2025
$39.2 M
Asset Class
Fixed Income
Morningstar Category
Muni National Short
CUSIP
09253C793
Open to New Investors
Yes

Portfolio Characteristics

Portfolio Characteristics

Number of Holdings
as of Oct 31, 2025
187
Alpha (3y)
as of Sep 30, 2021
0.03
R-Squared (3y)
as of Sep 30, 2021
71.06
Beta (3y)
as of Sep 30, 2021
0.25
Unsubsidized 30-Day SEC Yield
as of Oct 31, 2025
3.01%
Nominal WAL
as of Oct 31, 2025
4.20 yrs
Best 3-Month Return Over the Last 3 Years
3 months ending Dec 31, 2023
3.35%
30 Day SEC Yield
as of Oct 31, 2025
3.05%
Yield to Maturity
as of Oct 31, 2025
3.48%
Fund Standard Deviation (3y)
as of Sep 30, 2021
1.09
Average Coupon
as of Oct 31, 2025
4.83%
Yield to Worst
as of Oct 31, 2025
3.28%
Effective Duration
as of Oct 31, 2025
3.54 yrs
Worst 3-Month Return Over the Last 3 Years
3 months ending Oct 31, 2023
-0.74%

For the latest month-end Distribution Yield, click here.


This information must be preceded or accompanied by a current prospectus. For standardized performance, please see the Performance section above.

Fees

Fees

as of current prospectus
Gross Expense Ratio 0.38%
Net Expense Ratio 0.32%

Net Expense Ratio excluding Investment Related Expenses is 0.31%

  • Acquired Fund Fees and Expenses 0.01%
  • Interest expense 0.00%

Ratings

Ratings

Morningstar Rating

4 stars
Overall Morningstar Rating for BlackRock Short Duration Muni Fund, as of Nov 30, 2025 rated against 195 Muni National Short Funds based on risk adjusted total return.

Morningstar Medalist Rating

Morningstar Medalist Rating - BRONZE
Morningstar has awarded the Fund a Bronze medal. (Effective Oct 31, 2025)
Analyst-Driven % as of Oct 31, 2025
10.00
Data Coverage % as of Oct 31, 2025
99.00

Lipper Leader

 
 
 
 
 
 
Overall Lipper Leaders ratings based on an equal-weighted average of percentile ranks for each measure over 3-, 5-, and 10-year periods (if applicable) and do not take into account the effects of sales charges for these categories (Consistent Return, Preservation, Total Return, Expense, and Tax Efficiency) as of Sep 30, 2025 out of 128, 6,065, 128, 62 and 128 Funds, respectively in Lipper's Short Muni Debt Funds classification.

Holdings

Holdings

as of Oct 31, 2025
Name Weight (%)
SOUTHEAST ENERGY AUTH COMMODIT 5.25 01/01/2054 2.41
NEW JERSEY ECONOMIC DEV AUTH R 5 11/01/2026 2.32
SOUTHEAST ENERGY AUTH COOP DIS 5 01/01/2054 2.27
MAIN STR NAT GAS INC GA GAS SU 5 07/01/2053 2.27
LOUISIANA PUB FACS AUTH SOLID 5 10/01/2043 2.14
Name Weight (%)
BLACK BELT ENERGY GAS DIST ALA 5.25 02/01/2053 1.95
UTILITY DEBT SECURITIZATION AU 5 12/15/2033 1.84
MICHIGAN ST HOSP FIN AUTH REV 5 08/15/2055 1.68
TRIBOROUGH BRDG & TUNL AUTH N 4.91403 04/01/2026 1.57
PENNSYLVANIA ECONOMIC DEV FING 5 03/15/2060 1.53
Name Market Value Weight (%) Shares Maturity Coupon (%)
Detailed Holdings and Analytics
Holdings are subject to change. Fund holdings and allocations shown are unaudited, and may not be representative of current or future investments. The Fund is actively managed and its details, holdings and characteristics will vary. Holdings shown should not be deemed as a recommendation to buy or sell securities. The user relies on this data at its own risk and neither BlackRock nor any other party makes any representations or express or implied warranties (which are expressly disclaimed) nor shall they incur any liability for any errors or omissions in the data.

Exposure Breakdowns

Exposure Breakdowns

as of Oct 31, 2025

% Notional Value

Type Fund Benchmark Net
as of Oct 31, 2025

% Notional Value

Type Fund Benchmark Net
as of Dec 03, 2025

% Notional Value

Type Fund
as of Dec 03, 2025

% Notional Value

Type Fund
The fund itself has not been rated by an independent rating agency. Credit quality ratings on underlying securities of the fund are received from S&P, Moody’s and Fitch and converted to the equivalent S&P major rating category. This breakdown is provided by BlackRock and takes the median rating of the three agencies when all three agencies rate a security the lower of the two ratings if only two agencies rate a security and one rating if that is all that is provided. Unrated securities do not necessarily indicate low quality. Below investment-grade is represented by a rating of BB and below. Ratings and portfolio credit quality may change over time.

Notional value represents a fund’s use of derivatives, including but not limited to futures, options, and swaps. This value captures the fund exposures as if the derivative was replaced with the underlying asset and the corresponding financing or lending, such that all exposures sum to the net asset value. For non-derivatives, the market value and the notional value are identical.

Allocations are subject to change.

Portfolio Managers

Portfolio Managers

Kristi Manidis
Kristi Manidis
Director, Portfolio Manager, Municipal Mutual Funds

  

Read More

Kristi Manidis, Director, is a Portfolio Manager for the Municipal Fixed Income business in BlackRock's Portfolio Management Group.

 

Prior to moving to her current role in 2009, Ms. Manidis was a trader and portfolio manager on various high net worth equity and balanced separately managed accounts. Previously, she was responsible for institutional client service and marketing for BlackRock's Cash Management Group. Ms. Manidis began her career at BlackRock in 2003.

 

Ms. Manidis earned a BS degree in Business Administration, with concentrations in Finance and Management Information Systems, from Drexel University in 2003.

Kevin Maloney, CFA
Kevin Maloney, CFA
Managing Director, Co-Head and Portfolio Manager, Municipal Mutual Funds

  

Read More

Kevin Maloney, CFA, Managing Director and Co-Head of the Municipal Funds team, is a Portfolio Manager within the Municipal Fixed Income business in BlackRock's Portfolio Management Group. He is also a member of the Municipal Management Committee, which oversees all municipal bond portfolio management, research, and trading activities.

 

Mr. Maloney began his career at BlackRock in 2011 as a research analyst on the Municipal Credit Research Team.

 

He graduated from Drexel University in 2011 with a BS degree in Finance.

Christian Romaglino, CFA
Christian Romaglino, CFA
Director, Portfolio Manager, Municipal Mutual Funds

   

Read More

Christian Romaglino, CFA, Director, is a Portfolio Manager for the Municipal Fixed Income business within BlackRock's Portfolio Management Group.
Prior to joining BlackRock in 2017, Mr. Romaglino was a Portfolio Manager at Brown Brothers Harriman focusing on a diverse set of institutional mandates and high net worth SMAs. Mr. Romaglino also held various trading and portfolio construction positions at Brown Brothers Harriman across several taxable fixed income sectors prior to 2010 when he transitioned to Municipals.
Mr. Romaglino earned a BS degree in Industrial Engineering from Lehigh University.

Alicia De Lorenzo
Alicia De Lorenzo
Vice President, Portfolio Manager, Municipal Mutual Funds

  

Read More

Alicia De Lorenzo, Vice President, is a portfolio manager within the Municipal Fixed Income business in BlackRock's Portfolio Management Group.

 

Prior to her current role, Ms. De Lorenzo was a member of the Municipal Strategy team within BlackRock's Portfolio Management Group. Her responsibilities included monitoring and analyzing market activity to develop data and strategy that contributed to the multiple businesses within the municipal department.

 

Previously, Ms. De Lorenzo was a portfolio specialist for BlackRock’s Separately Managed Accounts business within Multi-Asset Strategies (MAS). In this role she partnered with Financial Advisors and Financial Professionals to provide customized portfolios and wealth management solutions for high net worth and institutional clients.

 

Ms. De Lorenzo's service with the firm dates back to 2007 when she was a member of the Aladdin Portfolio Services Group within Business Operations. Her responsibilities included producing monthly net asset value and performance measurement for BlackRock's institutional separate accounts.

 

Ms. De Lorenzo earned a BS degree in Finance from Rider University.

Portfolio Manager
Read the Team's Commentary

ESG Integration

ESG Integration

BlackRock considers many investment risks in our processes. In order to seek the best risk-adjusted returns for our clients, we manage material risks and opportunities that could impact portfolios, including financially material Environmental, Social and/or Governance (ESG) data or information, where available. See our Firm Wide ESG Integration Statement for more information on this approach and fund documentation for how these material risks are considered within this product, where applicable.

This fund does not seek to follow a sustainable, impact or ESG investment strategy. For more information regarding the fund's investment strategy, please see the fund's prospectus or, as applicable, shareholder report.

Literature

Literature

 

Funds related to MPLMX

Funds related to MPLMX

MAMTX
Strategic Municipal Opportunities Fund
Learn more about MAMTX
SUB
iShares Short-Term National Muni Bond ETF
Learn more about SUB
MANLX
National Municipal Fund
Learn more about MANLX

There are many ways to access BlackRock Funds, learn how you can add them to your portfolio
Learn More Learn More

Discuss with your financial planner today

Share this fund with your financial planner to find out how it can fit in your portfolio.

Buy through your brokerage

BlackRock funds are also available through certain brokerage accounts. Visit your brokerage today to see how you can get started.

Carefully consider the Funds' investment objectives, risk factors, and charges and expenses before investing. This and other information can be found in the Funds' prospectuses or, if available, the summary prospectuses, which may be obtained by visiting the iShares ETF and BlackRock Fund prospectus pages. Read the prospectus carefully before investing. Investing involves risk, including possible loss of principal.

The Funds are distributed by BlackRock Investments, LLC (together with its affiliates, “BlackRock”).

©2020 BlackRock, Inc. All rights reserved. BLACKROCK, BLACKROCK SOLUTIONS, BUILD ON BLACKROCK, ALADDIN, iSHARES, iBONDS, iTHINKING, iSHARES CONNECT, FUND FRENZY, LIFEPATH, SO WHAT DO I DO WITH MY MONEY, INVESTING FOR A NEW WORLD, BUILT FOR THESE TIMES, the iShares Core Graphic, CoRI and the CoRI logo are registered and unregistered trademarks of BlackRock, Inc., or its subsidiaries in the United States and elsewhere. All other marks are the property of their respective owners.

USR-9694