Invesco Trust for Investment Grade Municipals

Ratings are based on S&P, Moody's or Fitch, as applicable. A credit rating is an assessment provided by a nationally recognized statistical rating organization (NRSRO) of the creditworthiness of an issuer with respect to debt obligations, including specific securities, money market instruments or other debts. Ratings are measured on a scale that generally ranges from AAA (highest) to D (lowest); ratings are subject to change without notice. NR indicates the debtor was not rated, and should not be interpreted as indicating low quality. If securities are rated differently by the rating agencies, the higher rating is applied. Credit ratings are based largely on the rating agency's investment analysis at the time of rating and the rating assigned to any particular security is not necessarily a reflection of the issuer's current financial condition. The rating assigned to a security by a rating agency does not necessarily reflect its assessment of the volatility of a security's market value or of the liquidity of an investment in the security. For more information on the rating methodology, please visit the following NRSRO websites: www.standardandpoors.com and select 'Understanding Ratings' under Rating Resources on the homepage; www.moodys.com and select 'Rating Methodologies' under Research and Ratings on the homepage; www.fitchratings.com and select 'Ratings Definitions' on the homepage.