After long delays, Freddie Mac is close to selling a mortgage-backed security that will include non-agency risk-sharing features. The sale will be part of efforts by the two government-sponsored enterprises to test risk-sharing arrangements on at least $30 billion of business this year, as required by the Federal Housing Finance Agency. A Freddie spokesman said it is “premature” to comment on any deals, but those with knowledge of the pending issuance said the GSE hired Credit Suisse to help market the security ...