Miguel wrote:audifan wrote:not quite true wb
bookies usually start by 'making a book ' on what they THINK the punters will do , then adjust for the reality
of course they bet themselves on the outsiders by offering the long odds where they don't get any takers
Mmm... I always thought it was the other way around: bookies publish their odds that, according to their knowledge, more closely reflects reality while producing a benefit. Then, these odds will be modified with both newer knowledge as well as previously made bets, in order to cover their backs in case many people start betting money for an underdog... and then it wins. Exactly like the stock markets.
Audi Fan,
and Miguel are correct here the books set the line, and then move it according to the amount of capitol being wagered. If you add up all odds they will always come out at about 10% unaccounted for. This is the house vig. or vigorish! To simplify it if you only had a single proposition, there are two ways the house institute this. For instance in betting a winner of a football match(with points adjusted) you have to wager $110 to collect $210. That’s a straight bet with a built in vig of just under 10% Then you have a money line,(which is what were dealing with in F1) to simplify it If the only two cars in the race were Hamilton vs. Button the line would read something like The Boss -120 Button +110. That means you need to bet $120 on The Boss to win $100, and you would need to bet $100 to win $110 on Button So if equal amounts go onto both propositions the house collects the 10% not accounted for in the money line. If a proposition gets too lopsided they will take it off the board, (accept no more bets on it) and then try to wager half that money at another book on the same proposition.
http://en.wikipedia.org/wiki/Vigorish
Vigorish, or simply the vig, also known as juice or the take, is the amount charged by a bookmaker, or bookie, for his services. In the United States it also means the interest on a shark's loan. The term is Yiddish slang originating from the Russian word for winnings, vyigrysh. Bookmakers use this concept to make money on their wagers regardless of the outcome. Because of the vigorish concept, bookmakers should not have an interest in either side winning in a given sporting event. They are interested, instead, in getting equal action on each side of the event. In this way, the bookmaker minimizes his risk and always collects a small commission from the vigorish. The bookmaker will normally adjust the odds, or line, to attract equal action on each side of an event.