We have changed our assessment of MS&AD Insurance Group's liquidity to "exceptional" from "strong." We are raising to 'A-1+' from 'A-1' our short-term counterparty credit ratings on Mitsui Sumitomo Insurance and Aioi Nissay Dowa Insurance, both of which we view as core operating companies of the group. We are affirming our long-term counterparty credit ratings and financial strength ratings on both entities at 'A+'. The outlooks on the long-term ratings on both entities remain stable. TOKYO (Standard&Poor's) May 13, 2015--Standard&Poor's Ratings Services today said that it has raised to 'A-1+' from 'A-1' its short-term counterparty credit ratings on Mitsui Sumitomo Insurance Co. Ltd. (MSI) and Aioi Nissay Dowa Insurance Co. Ltd. (ADI), both of which we