(5)The credit quality assessment methodologies referred to in Article 19(3) should be prudent enough to ensure that all qualitative and quantitative criteria supporting credit quality assessments are reliable and appropriate for properly assessing the credit quality of instruments eligible for investment. In addition, it should be ensured that the macroeconomic and microeconomic factors managers of MMFs take into consideration in a credit quality assessment are relevant for determining the credit quality of an issuer or of an instrument eligible for investment.