What does "plus" and "minus" mean as a sports betting term?
Odds expressed in terms of money, with $100 being the standard. If the odds are minus (–), then that amount of money must be wagered to win $100. (e.g. –150 means you must bet $150 to win $100.) If the odds are plus (+), that amount of money would be earned on a successful $100 wager. (e.g. +150 means you make $150 on a $100 wager.) Money line is also sometimes referred to as “American Odds.”
The standard (and often implied) number is –110, meaning a successful bet of $110 would net $100 profit. This is the “juice” or “vigorish” (aka “vig”) for the house or sportsbook. Assuming equal bets on both sides, the house has a built-in 10 percent cut of the action, regardless of the outcome of a particular sporting event.
This juice is a way to discourage gamblers from wagering on a heavy favorite. If the Golden State Warriors are listed at –500 to win the NBA championship, a successful $500 wager would only net $100.
On the flip side, the plus-minus juice can also encourage gamblers to wager on a longshot. If the Los Angeles Lakers are a +500 to win the NBA championship, a successful $100 bet would net $500.