This is because bookmakers are in business to make a profit, so they effectively charge a commission for taking wagers. This commission is known as the vig, short for vigorish, and it's one of the ways that bookmakers stay profitable. They don't charge it just for points spreads and totals either, as it's built into the odds for every wager that they offer.
The general purpose of spread betting is to create an active market for both sides of a binary wager, even if the outcome of an event may appear prima facie to be biased towards one side or the other. In a sporting event a strong team may be matched up against a historically weaker team; almost every game has a favorite and an underdog. If the wager is simply "Will the favorite win?", more bets are likely to be made for the favorite, possibly to such an extent that there would be very few betters willing to take the underdog.
For example: If it is universally believed that Alaska State is better than Hawaii Tech, a standard win/loss wager wouldn't work, since most likely people would bet more money on Alaska State. Therefore, the Sports Book could put the point spread on Alaska State at 6.5 points. This would mean if you bet on Alaska State, not only would they have to win the game, they'd have to win by at least 7 points to make you a winner, otherwise a ticket on Hawaii Tech, even though the team might have loss, would be a winner.
If you've ever made a full-game bet that was completely toast by half time, I will assume you know all about the half time bet. If you are one of the lucky few who don't know what that feeling is like, a half time bet allows you to wager on the outcome of the second half on any particular game - regardless of what happened in the first half. If you look hard enough and focus in on one or two games, you can often find a line that offers more value than you would normally find on a full game line because the line is soft. Read More >>
There is no such thing as a half point in sports, but there is in sports betting! The half point ensures that a side will win and that the match will not end in a push, where the spread equals the actual difference in points between the two teams. In a push all bettors get their money back, which is no good for the oddsmaker! Half points also give oddsmakers more control over lines, allowing them to set more specific values.
Remember that betting on NFL games with an online sportsbook or offline is not legal in all jurisdictions. So if you are planning on using FootballLOCKS.com's NFL selections to gamble on various NFL games, such as betting the NFL Super Bowl spread with an online NFL sportsbook, it might be wise to check if NFL gambling is legal in your specific jurisdiction.