In finance, government and private fixed income securities, such as bonds and notes, are considered investment grade if they have a low risk of default. Investment grade is determined based on a relative scale by credit rating agencies such as Standard & Poor's and Moody's. Such credit ratings express the ability and willingness of a borrowing organization to repay its debt and are based on many financial and economic indicators that influence the borrower's creditworthiness. Securities with a rating of BBB or above from Standard and Poor's or Baa3 or above from Moody's are considered investment grade.
I doubt HOMU is rated by Standard & Poor's and Moody's - They aren’t rating “Expert Market” stocks.