Eaton Vance Income Fund of Boston A (Eaton Vance Income Fund of Bost) fond

The fund currently invests primarily in high yield, high risk corporate bonds (commonly referred to as "junk bonds") which are rated lower than investment grade (i.e., bonds rated lower than Baa by Moody's Investors Service, Inc. ("Moody's") or lower than BBB by S&P Global Ratings ("S&P") or Fitch Ratings (“Fitch”)) or are unrated and of comparable quality as determined by the investment adviser.