The true purpose of a pointspread when it is released by any sportsbook is to try and attract an equal amount of betting action on either side of a matchup. If all the early money is flooding in on New England as the favorite with a seven point spread, the betting outlet handling this action is likely to move that betting spread to 7.5 points to try and attract some money towards Miami as the underdog.
On June 11, 2018, New Jersey became the third state to legalize sports betting, after Nevada and Delaware, with Gov. Phil Murphy signing the legislation into law. Sports betting in New Jersey began when a sportsbook opened at Monmouth Park Racetrack on June 14, 2018. Following this, sportsbooks opened at the casinos in Atlantic City and at Meadowlands Racetrack.
Point spreads are used since most recreational bettors prefer to wager even money propositions. In the above example, if there was no point spread, only moneyline betting would exist. So, if odds makers are giving the New England Patriots a 73% chance of winning a game, then in order to take bets and still have a small profit margin, the bookmaker would have no choice but to require Patriot bettors to stake $3.00 or more for each $1.00 they want to win.
What this spread means is that, for the purposes of wagering, the Chargers will have 3.5 points deducted from their final score. For a bet on them to be successful, they would therefore have to win by four points or more. The Colts, on the other hand, will have 3.5 points added to their final score. A bet on them would be successful if they won the game, or lost by 3 points or less.
If you'd rather not deal with point spreads, you can do a "Money Line" wager, which is whether the team/player you bet on wins or loses. You will see "Hawaii Tech +150 or Alaska Tech -140". This means if you bet on Hawaii Tech, if you bet $100, you would profit $150 (returns $250), while to win $100 on Alaska Tech, you must put up $140. Those ratios work whether you're betting $100, $10, or any other multiple of money.
While most football fans have seen a point spread before, not everyone understands how they work. There’s a common misconception that the oddsmakers are trying to outsmart their customers by posting the spread and getting people to bet on the wrong side. At the same time, many bettors think that their goal is to “beat the bookie.” This is false; as mentioned, the sportsbook is incentivized to keep the action on either team as balanced as possible, in order to limit exposure.
The team that has the minus sign, which is the favorite, has points deducted from its final score, while the dog, with the plus sign, has points added. The favorite must beat the spread, which means they have to win by more than the negative number to pay off. The underdog pays off in two instances—if they win outright or if they lose by less than the spread.
Money Line: More common in baseball and hockey, pro football moneylines are growing in popularity. There is no spread, so your team just needs to win the game, not win by a certain number of points. The negative value means a favorite (-190) and a positive one indicates an underdog (+170). Picture the number 100 sitting in between these two values. Example: if you want to pick a -190 favorite, you must risk $190 in order to win $100. To back a +170 underdog, you put up $100 and win $170 if the dog wins. In some cases, betting moneylines is actually better value and can provide a bigger profit for less risk.