One important assumption is that to be credited with a win, either team only needs to win by the minimum of the rules of the game, without regard to the margin of victory. This implies that teams in a winning position will not necessarily try to extend their margin—and more importantly, each team is only playing to win rather than to beat the point spread. This assumption does not necessarily hold in all situations. For example, at the end of a season, the total points scored by a team can affect future events such as playoff seeding and positioning for the amateur draft, and teams may "run up" the score in such situations. In virtually all sports, players and other on-field contributors are forbidden from being involved in sports betting and thus have no incentive to consider the point spread during play; any attempt to manipulate the outcome of a game for gambling purposes would be considered match fixing, and the penalty is typically a lifetime banishment from the sport, such is the lack of tolerance for gambling in sport.
Easily the most popular type of betting for NFL football is “spread” betting or more commonly known as betting against the spread. Bettors who are new to NFL betting or betting in general may be a little confused with NFL spread betting, but it is pretty easy to understand once it is explained to you. We will explain what betting against the spread means below.
As you can see, each team is listed, followed by the adjustment or line change for each team, and then the odds that you would be paid out. If you notice, Chelsea has the word scratch next to their name. This is because they are the league favorite to win and all other adjustments are made about them. If your team is in first place at the end of the regular season after the adjustments are made, you will win your bet and be paid the posted odds. As you can see, the odds pay out fairly well on these bets as they are season long and are more difficult to win.
Notice that point spreads adjust the score for the favorite team. This is easiest to see with an example: If the New York Knicks are playing the Boston Celtics, and Boston is favored to win by a 4-point spread, then a bet on Boston only pays out if Boston wins by more than 4 points. A bet on New York pays out if New York wins or if they lose by less than 4 points.
When wagering on a driver matchup, both drivers involved must start the race (cross the finish line) otherwise the wager is "No Action" and the money is refunded. In a case where the starting driver is replaced during the race with another driver from the same team (same car), the position the new driver finishes in will be awarded to the original driver. This holds for wagering on win odds and driver matchups.

If the team is an underdog, then the moneyline number represents exactly how much you would get paid in profit for a correct pick. So if we were to bet $100 on the Boston Celtics and won, we would get paid $145 in profit. Seems easy enough, but you may already be asking what happens if you don’t want to bet in increments of $100. This is totally fine and still straight forward to figure out.
This is the format that terrifies people the most. We can promise you that fractions aren’t as scary as they seem if they’re explained properly. Here is the easiest way to calculate your profits and payouts with fractional odds. Solve the fraction and then multiply that number by your bet size to get your potential profit. If you can’t remember how to solve fractions, it’s ok. Don’t look at it as a “fraction” but more as a division problem. 13/20 is the same as 13 divided by 20. 29/20 is the same as 29 divided by 20.
From time to time, DraftKings might decide to publish offerings referring either to the single performance of a participant or team; or offerings which combine the potential outcomes of 2 or more participants at higher odds than those normally available, also known as ‘Bet of the Day’. DraftKings reserves the right to withdraw such offers, edit the respective odds, and effect any further changes that might deem necessary at its sole discretion.
You’ll need to know how the rotation number, point spread, moneyline and over/under are used and what each means. Each of these terms may be called by another name. The rotation number if often referred to as the number or the rotation mark, moneyline becomes line, point spread is called the spread, and over/under becomes the total. When you come down to it, these are the major terms that can be lumped under the heading odds.
We mentioned we would touch on the -3500 bet in this section. If you calculate the implied probability of -3500, you see that it is 97.2%. This means that the bet will have to hit 97.2% of the time for you to break even. Now, if you think that the bet is actually 100%, then it might be a smart bet to make. You’re still going to have to put up a lot of money to see any real sort of profit, which might not be desirable based on your personal preferences.
You can also bet straight winners and losers -- with no point spreads involved -- with money line wagers. When there is a minus number you bet that amount to win $100 in profit. When there is a plus number, that is your winning profit for every $100 wagered. So if the Cowboys have a money line of -250, you would have to bet $250 on them to win $100 in profit on any Dallas victory. If the Giants had a money line of +150, you would win $150 in profit with a winning $100 bet. If a money line is posted as even, you would win a $100 profit on a $100 winning bet.
Another popular form of golf betting involves matchup propositions, in which two golfers are paired against each other in a head-to-head wager, with a betting line on each golfer set by the oddsmaker. The golfer with the better (lower) score wins the matchup. (If one golfer continues play in the tournament after his opponent misses the cut, the golfer who continues play wins the matchup.)

In theory, sportsbooks don't care about the outcome of a game, although for those of you who bet on the Steelers (-5.5) last season versus the Chargers and saw a game winning TD  returned by S Troy Palumalu as the game expired reversed, thus negating a seven point victory and putting the final at 11-10, you might think otherwise, but this is how it's supposed to be.
A spread is a range of outcomes and the bet is whether the outcome will be above or below the spread. Spread betting has been a major growth market in the UK in recent years, with the number of gamblers heading towards one million.[1] Financial spread betting (see below) can carry a high level of risk if there is no "stop".[2] In the UK, spread betting is regulated by the Financial Conduct Authority rather than the Gambling Commission.[3]

One of the main reasons that sports bettors like to bet is the action and excitement of winning and losing. Many sports bettors would rather take the risk of winning or losing than having the option of pushing (a tie) on their bets. For this reason, many sportsbooks offer what are called no draw handicap match bets. These are bets on an individual match that are designed so that there is never going to be a tie. In the standard handicap bet examples we used above, you saw that all of the bet options were in whole numbers. This allows for there to be draws.
Let's look at a different option. We bet the Cowboys +3, and the final score is Chargers 21, Cowboys 19. Even though the Cowboys lost the game, we still win our bet because they lost by less than three points. How much are we going to get paid on this bet? Well, we look in the parenthesis and see we will get paid at -120. This means that for every $100 we bet, we will get paid $83.33 in profit.
When two teams square up for a matchup, whether that be on the gridiron or on the basketball court, one team is typically better than the other (for whatever reason you want to believe). Since sportsbooks are in the business of making money, they tag the better team with a point spread, thus making them the "favorites" to win that specific game. Normally, the favorite has a few favorable factors working for them like playing at home or being well rested or playing a revenge game against a team that previously beat them. Every factor counts in the world of betting, and it's up to you to decide if the "favorite' can, in fact, cover the point spread.
Sports betting has been around since 1000 B.C in China, where betting on animal fights was commonplace. In ancient Rome, one could wager on the Gladiatorial games. The idea of betting on sports is as old as organized sport itself. But up until the 1940s, bettors were fairly limited in what kind of bets they could make. The standard system of odds would allow bets on, for example, the 3-1 odds that the Steelers would beat the Browns.
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