What the UFC Moneyline Number Actually Means
A negative number — say -180 — tells you how much you need to wager to profit $100 on the favorite. A positive number — like +155 — shows what a $100 wager returns in profit if the underdog wins. Those two numbers are the whole moneyline system. Neither fighter's line is arbitrary: it reflects the implied probability of each outcome, which
is why the favorite's negative number and the underdog's positive number don't add up to a clean 200. The gap between them is the book's margin. Once you internalize that math, every UFC moneyline card becomes readable at a glance.