First-party writing on how the NFL market behaves and how to read it: quote timing, line movement, book coverage, model-versus-market gaps, and where the evidence stays unresolved. No picks and no live member data — explanation you can check against the market yourself.
Model vs market4 min read
An FDI player projection is an expected value; a sportsbook line is a number chosen to balance two prices. Why the two are different objects, why the difference between them is arithmetic rather than a signal, and how to read them together.
Methodology4 min read
A model can estimate the chance a player finishes above a specific number. Here is what that estimate means, why FDI shows it only when the current line matches a modeled threshold exactly, and why it is never turned into an instruction.
Methodology4 min read
A sportsbook line is a snapshot, not a fixed fact. Why every FDI market figure carries the time it was observed, what changes when a quote goes stale, and why FDI will not compare a projection with a line that is no longer current.
Methodology4 min read
A backtest asks how a model would have done on games that already happened. Prospective tracking records each prediction before the game and checks it afterward. Why the difference matters, and why FDI relies on the second.
Weekly briefing5 min read
A Week 4 briefing on reading the NFL market: quote timing, line movement, book coverage, key numbers, model disagreement, NO READ, and what changes between early week and kickoff.
Model vs market4 min read
A projection that differs from a sportsbook line is a question, not an answer. Model error, the book’s margin, book-to-book differences, stale quotes and availability all decide what a gap can mean.
Get new First Down Intel research, NFL market intelligence, and occasional product updates by email.
By subscribing, you agree to receive the FDI NFL Briefing by email. Confirm your subscription from the email we send you. You can unsubscribe at any time. See our Privacy Policy.