v3.25.2
Shareholder Report, Holdings (Details)
Jun. 30, 2025
C000006121 [Member] | N R [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.80% [1],[2]
C000006121 [Member] | Standard & Poor's, AAA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.50% [1],[2]
C000006121 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 58.00% [1],[2]
C000006121 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 22.50% [1],[2]
C000006121 [Member] | Standard & Poor's, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.40% [1],[2]
C000006121 [Member] | Standard & Poor's, BB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [1],[2]
C000006121 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.20% [1],[2]
C000006121 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.10% [1],[3]
C000006121 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.20% [1],[3]
C000006121 [Member] | Corporate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.50% [1],[3]
C000006121 [Member] | State [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.80% [1],[3]
C000006121 [Member] | Health [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [1],[3]
C000006121 [Member] | Education [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.70% [1],[3]
C000006121 [Member] | County City Special District School District [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.30% [1],[3]
C000006121 [Member] | Housing [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.10% [1],[3]
C000006121 [Member] | Tobacco [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.30% [1],[3]
C000100249 [Member] | N R [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.80% [4],[5]
C000100249 [Member] | Standard & Poor's, AAA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.50% [4],[5]
C000100249 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 58.00% [4],[5]
C000100249 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 22.50% [4],[5]
C000100249 [Member] | Standard & Poor's, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.40% [4],[5]
C000100249 [Member] | Standard & Poor's, BB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [4],[5]
C000100249 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.20% [4],[5]
C000100249 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.10% [4],[6]
C000100249 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.20% [4],[6]
C000100249 [Member] | Corporate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.50% [4],[6]
C000100249 [Member] | State [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.80% [4],[6]
C000100249 [Member] | Health [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [4],[6]
C000100249 [Member] | Education [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.70% [4],[6]
C000100249 [Member] | County City Special District School District [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.30% [4],[6]
C000100249 [Member] | Housing [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.10% [4],[6]
C000100249 [Member] | Tobacco [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.30% [4],[6]
C000006118 [Member] | N R [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.80% [7],[8]
C000006118 [Member] | Standard & Poor's, AAA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.50% [7],[8]
C000006118 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 58.00% [7],[8]
C000006118 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 22.50% [7],[8]
C000006118 [Member] | Standard & Poor's, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.40% [7],[8]
C000006118 [Member] | Standard & Poor's, BB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [7],[8]
C000006118 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.20% [7],[8]
C000006118 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.10% [7],[9]
C000006118 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.20% [7],[9]
C000006118 [Member] | Corporate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.50% [7],[9]
C000006118 [Member] | State [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.80% [7],[9]
C000006118 [Member] | Health [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [7],[9]
C000006118 [Member] | Education [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.70% [7],[9]
C000006118 [Member] | County City Special District School District [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.30% [7],[9]
C000006118 [Member] | Housing [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.10% [7],[9]
C000006118 [Member] | Tobacco [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.30% [7],[9]
C000038033 [Member] | N R [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.80% [10],[11]
C000038033 [Member] | Standard & Poor's, AAA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.50% [10],[11]
C000038033 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 58.00% [10],[11]
C000038033 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 22.50% [10],[11]
C000038033 [Member] | Standard & Poor's, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.40% [10],[11]
C000038033 [Member] | Standard & Poor's, BB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [10],[11]
C000038033 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.20% [10],[11]
C000038033 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.10% [10],[12]
C000038033 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.20% [10],[12]
C000038033 [Member] | Corporate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.50% [10],[12]
C000038033 [Member] | State [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.80% [10],[12]
C000038033 [Member] | Health [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [10],[12]
C000038033 [Member] | Education [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.70% [10],[12]
C000038033 [Member] | County City Special District School District [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.30% [10],[12]
C000038033 [Member] | Housing [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.10% [10],[12]
C000038033 [Member] | Tobacco [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.30% [10],[12]
C000100250 [Member] | N R [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.80% [13],[14]
C000100250 [Member] | Standard & Poor's, AAA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.50% [13],[14]
C000100250 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 58.00% [13],[14]
C000100250 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 22.50% [13],[14]
C000100250 [Member] | Standard & Poor's, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.40% [13],[14]
C000100250 [Member] | Standard & Poor's, BB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [13],[14]
C000100250 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.20% [13],[14]
C000100250 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.10% [13],[15]
C000100250 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.20% [13],[15]
C000100250 [Member] | Corporate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.50% [13],[15]
C000100250 [Member] | State [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.80% [13],[15]
C000100250 [Member] | Health [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [13],[15]
C000100250 [Member] | Education [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.70% [13],[15]
C000100250 [Member] | County City Special District School District [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.30% [13],[15]
C000100250 [Member] | Housing [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.10% [13],[15]
C000100250 [Member] | Tobacco [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.30% [13],[15]
C000006125 [Member] | N R [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.20% [16],[17]
C000006125 [Member] | Standard & Poor's, AAA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [16],[17]
C000006125 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 35.10% [16],[17]
C000006125 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 43.30% [16],[17]
C000006125 [Member] | Standard & Poor's, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [16],[17]
C000006125 [Member] | Standard & Poor's, BB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [16],[17]
C000006125 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 19.70% [16],[18]
C000006125 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.70% [16],[18]
C000006125 [Member] | Corporate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.50% [16],[18]
C000006125 [Member] | State [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [16],[18]
C000006125 [Member] | Health [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.10% [16],[18]
C000006125 [Member] | Education [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90% [16],[18]
C000006125 [Member] | County City Special District School District [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.50% [16],[18]
C000006125 [Member] | Housing [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [16],[18]
C000006125 [Member] | Tobacco [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [16],[18]
C000038034 [Member] | N R [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.20% [19],[20]
C000038034 [Member] | Standard & Poor's, AAA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [19],[20]
C000038034 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 35.10% [19],[20]
C000038034 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 43.30% [19],[20]
C000038034 [Member] | Standard & Poor's, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [19],[20]
C000038034 [Member] | Standard & Poor's, B Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [19],[20]
C000038034 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 19.70% [19],[21]
C000038034 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.70% [19],[21]
C000038034 [Member] | Corporate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.50% [19],[21]
C000038034 [Member] | State [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [19],[21]
C000038034 [Member] | Health [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.10% [19],[21]
C000038034 [Member] | Education [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90% [19],[21]
C000038034 [Member] | County City Special District School District [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.50% [19],[21]
C000038034 [Member] | Housing [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [19],[21]
C000038034 [Member] | Tobacco [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [19],[21]
C000006122 [Member] | N R [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.20% [22],[23]
C000006122 [Member] | Standard & Poor's, AAA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [22],[23]
C000006122 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 35.10% [22],[23]
C000006122 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 43.30% [22],[23]
C000006122 [Member] | Standard & Poor's, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [22],[23]
C000006122 [Member] | Standard & Poor's, BB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [22],[23]
C000006122 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 19.70% [22],[24]
C000006122 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.70% [22],[24]
C000006122 [Member] | Corporate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.50% [22],[24]
C000006122 [Member] | State [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [22],[24]
C000006122 [Member] | Health [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.10% [22],[24]
C000006122 [Member] | Education [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90% [22],[24]
C000006122 [Member] | County City Special District School District [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.50% [22],[24]
C000006122 [Member] | Housing [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [22],[24]
C000006122 [Member] | Tobacco [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [22],[24]
C000006124 [Member] | N R [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.20% [25],[26]
C000006124 [Member] | Standard & Poor's, AAA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [25],[26]
C000006124 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 35.10% [25],[26]
C000006124 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 43.30% [25],[26]
C000006124 [Member] | Standard & Poor's, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [25],[26]
C000006124 [Member] | Standard & Poor's, BB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [25],[26]
C000006124 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 19.70% [25],[27]
C000006124 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.70% [25],[27]
C000006124 [Member] | Corporate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.50% [25],[27]
C000006124 [Member] | State [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [25],[27]
C000006124 [Member] | Health [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.10% [25],[27]
C000006124 [Member] | Education [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90% [25],[27]
C000006124 [Member] | County City Special District School District [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.50% [25],[27]
C000006124 [Member] | Housing [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [25],[27]
C000006124 [Member] | Tobacco [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [25],[27]
C000038035 [Member] | N R [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.20% [28],[29]
C000038035 [Member] | Standard & Poor's, AAA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [28],[29]
C000038035 [Member] | Standard & Poor's, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 35.10% [28],[29]
C000038035 [Member] | Standard & Poor's, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 43.30% [28],[29]
C000038035 [Member] | Standard & Poor's, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [28],[29]
C000038035 [Member] | Standard & Poor's, BB Rating [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [28],[29]
C000038035 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 19.70% [28],[30]
C000038035 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.70% [28],[30]
C000038035 [Member] | Corporate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.50% [28],[30]
C000038035 [Member] | State [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [28],[30]
C000038035 [Member] | Health [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.10% [28],[30]
C000038035 [Member] | Education [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90% [28],[30]
C000038035 [Member] | County City Special District School District [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.50% [28],[30]
C000038035 [Member] | Housing [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [28],[30]
C000038035 [Member] | Tobacco [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60% [28],[30]
[1] Excludes short-term securities.
[2] For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
[3] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
[4] Excludes short-term securities.
[5] For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
[6] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
[7] Excludes short-term securities.
[8] For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
[9] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
[10] Excludes short-term securities.
[11] For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
[12] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
[13] Excludes short-term securities.
[14] For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
[15] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
[16] Excludes short-term securities.
[17] For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
[18] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
[19] Excludes short-term securities.
[20] For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
[21] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
[22] Excludes short-term securities.
[23] For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
[24] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
[25] Excludes short-term securities.
[26] For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
[27] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
[28] Excludes short-term securities.
[29] For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
[30] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.