Eaton Vance Income Fund of Boston Class R6 

This fund primarily allocates its capital to corporate debt instruments that offer substantial returns but are accompanied by elevated risk, often referred to as "junk bonds." These holdings consist of bonds rated below the investment-grade threshold, meaning they have received a rating lower than Baa from Moody's Investors Service, Inc., or a rating inferior to BBB from S&P Global Ratings or Fitch Ratings. The fund may also include unrated bonds, provided the investment adviser deems them to be of comparable quality.