NEW YORK–(BUSINESS WIRE)–Kroll Bond Rating Agency (KBRA) assigns preliminary ratings to 57 classes from Connecticut Avenue Securities, Series 2018-R07 (CAS 2018-R07), Fannie Mae’s first credit risk sharing transaction structured as a real estate mortgage investment conduit (REMIC) under the CAS shelf. The Offered Notes, with an aggregate original principal balance of $921,887,000, represent unsecured general obligations of Connecticut Avenue Securities Trust 2018-R07 as Issuer, with payments