Required credit enhancement

In a trade receivables securitization the funding party wants the pool to be worth meaningfully more than the amount funded, so that defaults, dilution, and a messy wind down can all happen without the lender losing money. That cushion is credit enhancement, and in most conduit programs it comes primarily from overcollateralization: the seller keeps a subordinated interest in the pool equal to the required enhancement percentage.

The dynamic structure is what makes these facilities self correcting. When performance deteriorates, the reserves grow, enhancement rises, and funding shrinks automatically. Borrowers who model this in advance avoid the unpleasant version, where the monthly report is the first place anyone sees availability fall.

The dynamic component is usually the loss reserve plus the dilution reserve, each calculated from the pool's trailing performance. The floor commonly combines the largest obligor concentration limits, so the structure survives the default of its biggest names, with a multiple of expected dilution. The required enhancement is whichever is higher.

With a 2.81 percent yield and servicing reserve on top, total reserves reach 29.51 percent and the funding base is $41,000,000 x (1 - 29.51%), about $28.9 million. Floor constructions vary: some use the largest obligor limits only, some add a fixed minimum such as 10 or 12 percent, and rating agency criteria differ, so treat these numbers as illustrative.

• Watch the peak windows: loss and dilution ratios typically use worst trailing averages, so enhancement stays elevated for months after a bad quarter.
• Track which side binds: when the floor binds, performance improvements do nothing until the dynamic calculation crosses back above it.
• Model amendments before signing: a stress factor moving from 2.0x to 2.25x on the pool above adds roughly 1.2 points of enhancement, about $490,000 of availability.
• Keep dilution and default data clean at source, because every misclassified credit memo flows straight into the enhancement percentage.

Olycor computes both legs of the calculation every period from invoice level data, shows which one binds and by how much, and lets you trace each reserve back through its ratio to the underlying transactions. The result is deterministic: rerun the same period and you get the same enhancement figure, with a full lineage behind it.