nascarodds
Jr. Member
Naturally, I will compare cases with approximately the same odds. Let's take Champions League matches and one Europa League match:
Sporting Lisbon - Manchester City FC 9.40 - 5.60 - 1.32
Paris Saint Germain - Real Madrid 2.07 - 3.70 - 3.50
Salzburg - Bayern Munich 8.80 - 6.00 - 1.32
Inter - Liverpool 3.40 - 3.60 - 2.14
Borussia Dortmund - Glasgow Rangers 1.37 - 5.40 - 8.00
The bookmaker's margin for the first match is: 1/9.4 + 1/5.6 + 1/1.32 =~ 1,0425 - Approximately 4% and in the selected matches it is almost the same (somewhere a little more than 4% and somewhere a little less, but the little things can be neglected).
So, if we bet on the victory of Sporting with odds of 9.4, then on average (if it were an infinitely repeating event) we will lose 4% from each bet.
What is the bookmakers margin if we make a multibet on: City win 1.32, PSG win 2.07, Bayern win 1.32, Liverpool win 2.14, Borussia win 1.37 with a total odds of 1.32x2.07x1.32x2.14x1.37=10.57? Since this is a multibet, not only the odds are multiplied, but also the margin. For the selected five events, it will be (1.04)5=1,21
Thus, the bookmaker's advantage in this multi bet will be 21% That is why bookmakers give various bonuses for multibets, for example, Sportsbet gives 10% if you select 5 events. But even with this bonus, the bookmaker's advantage is much higher than that of a bet with almost the same odds (11% vs 4%).
Therefore, if you think that you can predict more accurately than the bookmaker, avoid multi bets - it is much easier to beat the bookmaker when it has a handicap of 4% than 11% and higher.
Sporting Lisbon - Manchester City FC 9.40 - 5.60 - 1.32
Paris Saint Germain - Real Madrid 2.07 - 3.70 - 3.50
Salzburg - Bayern Munich 8.80 - 6.00 - 1.32
Inter - Liverpool 3.40 - 3.60 - 2.14
Borussia Dortmund - Glasgow Rangers 1.37 - 5.40 - 8.00
The bookmaker's margin for the first match is: 1/9.4 + 1/5.6 + 1/1.32 =~ 1,0425 - Approximately 4% and in the selected matches it is almost the same (somewhere a little more than 4% and somewhere a little less, but the little things can be neglected).
So, if we bet on the victory of Sporting with odds of 9.4, then on average (if it were an infinitely repeating event) we will lose 4% from each bet.
What is the bookmakers margin if we make a multibet on: City win 1.32, PSG win 2.07, Bayern win 1.32, Liverpool win 2.14, Borussia win 1.37 with a total odds of 1.32x2.07x1.32x2.14x1.37=10.57? Since this is a multibet, not only the odds are multiplied, but also the margin. For the selected five events, it will be (1.04)5=1,21
Thus, the bookmaker's advantage in this multi bet will be 21% That is why bookmakers give various bonuses for multibets, for example, Sportsbet gives 10% if you select 5 events. But even with this bonus, the bookmaker's advantage is much higher than that of a bet with almost the same odds (11% vs 4%).
Therefore, if you think that you can predict more accurately than the bookmaker, avoid multi bets - it is much easier to beat the bookmaker when it has a handicap of 4% than 11% and higher.