<SEC-DOCUMENT>0001193125-21-015941-index.html : 20210125 <SEC-HEADER>0001193125-21-015941.hdr.sgml : 20210125 <ACCEPTANCE-DATETIME>20210125141856 ACCESSION NUMBER: 0001193125-21-015941 CONFORMED SUBMISSION TYPE: N-CSR PUBLIC DOCUMENT COUNT: 17 CONFORMED PERIOD OF REPORT: 20201130 FILED AS OF DATE: 20210125 DATE AS OF CHANGE: 20210125 EFFECTIVENESS DATE: 20210125 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MFS HIGH YIELD MUNICIPAL TRUST CENTRAL INDEX KEY: 0000809844 IRS NUMBER: 042950868 STATE OF INCORPORATION: MA FISCAL YEAR END: 1130 FILING VALUES: FORM TYPE: N-CSR SEC ACT: 1940 Act SEC FILE NUMBER: 811-04992 FILM NUMBER: 21549283 BUSINESS ADDRESS: STREET 1: 111 HUNTINGTON AVENUE STREET 2: 24TH FLOOR CITY: BOSTON STATE: MA ZIP: 02199 BUSINESS PHONE: 617-954-5000 MAIL ADDRESS: STREET 1: 111 HUNTINGTON AVENUE STREET 2: 24TH FLOOR CITY: BOSTON STATE: MA ZIP: 02199 FORMER COMPANY: FORMER CONFORMED NAME: COLONIAL MUNICIPAL INCOME TRUST DATE OF NAME CHANGE: 19920703 </SEC-HEADER> <DOCUMENT> <TYPE>N-CSR <SEQUENCE>1 <FILENAME>d42615dncsr.htm <DESCRIPTION>MFS HIGH YIELD MUNICIPAL TRUST N-CSR <TEXT> Document 1 - file: d42615dncsr.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.CODE ETH <SEQUENCE>2 <FILENAME>d42615dex99codeeth.htm <DESCRIPTION>CODE OF ETHICS <TEXT> Document 2 - file: d42615dex99codeeth.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.CERT <SEQUENCE>3 <FILENAME>d42615dex99cert.htm <DESCRIPTION>SECTION 302 CERTIFICATIONS <TEXT> Document 3 - file: d42615dex99cert.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.906CERT <SEQUENCE>4 <FILENAME>d42615dex99906cert.htm <DESCRIPTION>SECTION 906 CERTIFICATIONS <TEXT> Document 4 - file: d42615dex99906cert.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.30E-3 NOTICE <SEQUENCE>5 <FILENAME>d42615dex9930e3notice.htm <DESCRIPTION>30E-3 NOTICE <TEXT> Document 5 - file: d42615dex9930e3notice.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.PROXYPOL <SEQUENCE>6 <FILENAME>d42615dex99proxypol.htm <DESCRIPTION>MFS PROXY VOTING POLICIES AND PROCEDURES <TEXT> Document 6 - file: d42615dex99proxypol.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>7 <FILENAME>g42615ernst_youngllp.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 7 - file: g42615ernst_youngllp.jpg
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</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>12 <FILENAME>g42615g26y27.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 12 - file: g42615g26y27.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>13 <FILENAME>g42615g28h40.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 13 - file: g42615g28h40.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>14 <FILENAME>g42615g67p04.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 14 - file: g42615g67p04.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>15 <FILENAME>g42615g72s28.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 15 - file: g42615g72s28.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>16 <FILENAME>g42615g82k67.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 16 - file: g42615g82k67.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>17 <FILENAME>g42615scan_.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 17 - file: g42615scan_.jpg
</DOCUMENT> </SEC-DOCUMENT>