In reply to ablackett:
> Why don't they set their odds so that they come out on top whoever wins?
if all the money is going on horse D, even at really lows odds, the money bet on the losers, A,B & C might not cover what they pay out on D. So they have to either lower the odds on D even further, or offer bigger odds on A,B,C to tempt some money in on them... but if D is at say 1-2, and ABC are all at 100-1... people will think ABC have zero hope and there still won't be a profit for the bookies... so they might put A at 5-1... which whilst still much longer than D, it looks it could be in with a chance, even though the bookies are pretty confident it has zero hope. It makes you think there is a race on, when in reality it's a foregone conclusion.
The favourites; lots of people simply only bet on the favourite, which statistically at any event may win once or twice in a 6 or 7 card event. So if you want to win X amount at the race, folk might bet enough on race 1 to win that amount, if they lose, they bet more on the favourite in Race 2 to cover their losses from R1 and still win X amount... statistically if you have a big enough pot and the ability to walk away once you've won your X, it can't fail. So in an event where the favourite wins most races, the bookies take a hit, from both zero knowledge joe public who simply picks the fav. and the professional following a system.
Clear as mud?!
Post edited at 14:06