NEW YORK (Standard&Poor's CreditWire) June 20, 2000--Standard&Poor's today assigned its single-'A'-plus senior debt rating, single-'A' subordinated debt rating, and single-'A'-minus preferred stock rating to Allstate Corp.'s (Allstate) shelf registration for up to $2 billion, filed yesterday for general corporate purposes. At the same time, Standard&Poor's affirmed all outstanding ratings on Allstate and its operating units. The outlook is stable. Allstate, a holding company, has a leading position in personal automobile and homeowners' insurance through Allstate Insurance Co., the nation's second-largest property/casualty (P/C) insurer, and its affiliated insurers, and in individual life insurance through Allstate Life Insurance Co. and its affiliates. The companies as a whole have recorded very strong earnings and maintained very strong