The Securities and Exchange Commission may pursue enforcement action against McGraw Hill Financial, the parent company of the Standard & Poor’s Ratings Services, in connection with six commercial mortgage-backed securities issued in 2011, McGraw Hill Financial announced on Wednesday.

McGraw Hill said that it received a Wells notice from the SEC on Tuesday. The notice is meant to alert the company of possible enforcement actions and provide it with time to respond. McGraw Hill said Standard and Poor’s, a leading company in financial market intelligence, was cooperating with the agency.