Freddie Announces 9th Multifamily Securities Offering of 2014, K-F04. Freddie Mac announced this week a new offering of Structured Pass-Through Certificates or K Certificates, backed exclusively by LIBOR-based, floating-rate multifamily mortgages with five- and seven-year terms. The GSE expects to offer approximately $1.2 billion in K Certificates, which priced on Aug. 6 and is expected to settle on or about August 25. This is Freddie’s ninth K Certificate offering this year. The GSE said it also reached an important milestone of securitizing more than $80 billion in multifamily mortgages through its K-Deal program.