Spread – also known as the line or point spread, it is generally thought of as the predicted margin of victory for one team. In reality, it's a number chosen by the oddsmaker that he feels will encourage an equal number of people to wager on the football underdog and the pigskin favorite. The negative value -13.5 indicates that team is favored by 13.5 points. The positive value +13.5 indicates that team is the underdog by 13.5 points. Betting on the favorite means the team must win by at least fourteen points to cover the spread. The underdog team can lose by thirteen points and still cover the spread.
The most common way to bet football is against the pointspread (ATS), often called a side bet. This involves making a wager on either the favorite or the underdog. For example, Team A is a 7-point favorite (-7) against Team B, making Team B a 7-point underdog (+7). If you bet on Team A, it must win by more than seven points for you to win your bet. Conversely, if you bet on Team B, it must lose by less than seven points for you to win your bet. Of course, if Team B wins outright, you also win your bet. If Team A wins by exactly seven points, your bet pushes and your wager is refunded.
Head-to-Head. In these bets, bettor predicts competitors results against each other and not on the overall result of the event. One example are Formula One races, where you bet on two or three drivers and their placement among the others. Sometimes you can also bet a “tie”, in which one or both drivers either have the same time, drop out, or get disqualified.

The basic principle of point spreads and totals is that you have roughly a 50% chance of winning, so technically a "fair" return on these types of wagers should be equal to the amount staked. However, they are usually priced up by bookmakers at odds of -110 (1.91 in decimal odds format, 10/11 in fractional odds format), which means for every $110 staked you stand to win $100. You don't have to stake as much as $110 of course, but the point is that a successful wager will only return 90% of the amount staked (plus the initial stake of course).


Futures betting also is offered on the major events in horse racing, such as the Kentucky Derby and Breeders' Cup. In horse racing futures, if your horse does not start the race due to injury or any other reason, you lose the bet -- there are no refunds. On the other hand, the odds on your horse racing futures bet also are "locked in," regardless of the horse's odds on race day.
Sometimes a line will move far enough to create a “middle” opportunity. Say the Texas Longhorns end up facing the Wisconsin Badgers in the first round of March Madness. If you have Texas early as a 5-point favorite, and I move the line to Texas –7 later in the week, then you can also place a bet on Wisconsin +7. If Texas happens to win by six points, both your bets cash in. Texas winning by either five or seven gives you a win and a push. Any other result creates a win and a loss, so you’re only risking the vigorish.
To achieve this balance, the book can move the spread and/or the juice at any time after the first lines hit the NFL odds board, all the way up until kick-off. If there had been too much action on the Packers at Super Bowl 1, the oddsmakers could have made Kansas City a 15-point underdog (+15), in order to encourage more people to bet on the Chiefs. They also could have kept the spread at 14 points and moved the juice, perhaps to –105 for Kansas City and -115 for Green Bay. You’ll often see the books adjust the juice first when the spread is three points; since so many NFL games end in a winning margin of three points (roughly one in six games), moving the spread from 3 to 3.5 points is a pretty big deal, and it might tilt the balance too far in the other direction.
The busiest season of the year in the sports book is upon us. Betting on football makes up more than half the money wagered on sports every year in Nevada. The Nevada Gaming Commission doesn’t break down the wager money by the level of football. However, it’s widely discussed that there’s more money wagered on the NFL than college football. Canadian and Arena football are really just available to pass the time for fans until the fall.

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