CHICAGO–(BUSINESS WIRE)–Fitch Ratings has assigned a Derivative Counterparty Rating (DCR) of ‘AA-(dcr)’ to State Street Corporation (STT) and ‘AA (dcr)’ to State Street Bank and Trust Company (SSBT) as part of its roll out of DCRs to significant counterparties in Western Europe and the U.S. DCRs are issuer ratings and express Fitch’s view of banks’ relative vulnerability to default under derivative contracts with third-party, non-government counterparties. KEY RATING DRIVERS DERIVATIVE COUNTE