How to Read USD New Issue Supply
The primary market is where corporate bond spreads are set in public. Every deal is a live test of how much investors will pay for a given issuer on a given morning — which is why supply is read daily rather than weekly.
Initial price talk (IPT)
The spread level a deal is first marketed at. It is deliberately generous; where the deal finally prices tells you how much demand showed up.
Guidance and launch
As orders build, talk tightens from IPT to guidance and then to launch. A large move from IPT to pricing signals a heavily oversubscribed book.
New issue concession
The extra spread paid versus the issuer's existing bonds. A wide concession compensates buyers; a negative one means the new deal priced through the curve.
Tranche structure
A two- or three-part deal spreads the raise across maturities. Which tranche prices best shows where demand actually sits on the curve.
Break performance
How the bond trades once free to trade. Tightening on the break means the deal was priced with room; widening means it was pushed too far.
What the weekly tally tells you
Volume matters as much as any single deal. Heavy supply into a market that keeps absorbing it without widening is a sign of real demand; the same volume met with concessions and weak breaks is a sign the bid is thinning. That is why the summary reports track the running tally alongside performance.
Where fair value comes in
G-255 marks each new issue against the model's fair value after guidance — so a deal is not only compared with the issuer's own curve, but with where the model says that curve should sit. A deal that prices cheap to both is a different proposition from one that merely prices cheap to a rich curve.