Court rules that retroactive payment of a price premium shifts the accrual date of process interest to the payment date.

The court held that process interest on a retroactively paid price premium accrues from the date of payment, not the original debt date. The plaintiff argued for interest from the initial debt date, while the defendant contended the retroactive payment date should trigger interest. The court decided that since the obligation was fulfilled retroactively, the procedural interest clock starts when the payment actually occurred.