48-hour rule

48-hour rule

PSA Uniform Practices requirement that all pool information in a to be announced (TBA) transaction be communicated by the seller to the buyer before 3 p.m. EST on the business day 48 hours prior to the agreed-upon trade date.

48-Hour Rule

A rule under the PSA Uniform Practices requiring that all information about the mortgages underlying a forward contract on a mortgage-backed security be communicated from a seller to a buyer by 3 p.m. two days before the delivery takes place. This contract is known as TBA.