Laying the favourite
Be careful! Many people see the betting exchanges and think of the famous phase 'You never see a poor bookmaker'. Then work towards the conclusion, if I lay the favourite on the betting exchanges I will eventually win money.
If you blindly lay the favourite football team or favourite horse you will almost inevitably lose. The next stage of most peoples thinking is to lay a number of selections, this is a much better approach as it reduces the amount of commission you will pay. The ideal scenario is when you are able to lay all the selections, so that no matter what the result, you win (known as a rounded book). This rarely happens and in general you will end up with an unbalanced book.
The only way of winning money by laying the favourite is if the favourite's chances of winning the race are actually lower than the price would suggest. For example if you believe the real chances of a horse winning a race are 40%, then it is OK to lay the horse at odds of 2. Odds of 2 suggests that the horse will win the race 50% of the time. In fact you could lay the horse up to odds of 2.5. Odds of 2.5 suggest the horse will win the race 40% of the time.
False Favourites
In football there are a number of teams who are backed blindly. For example Man United and Real Madrid. These teams are often over bet, meaning that people are just backing them because they support them or because they always back them and think they are unbeatable. In general these people do not have any specialist betting knowledge, but the weight of their money often influences the price. If you are able to tell when the odds are too short, for example Man United playing away on a rainy day at Southampton, then it is time to lay the favourite.
At this stage I would like to recommend an excellent book called 'Against the Crowd' by Alan Potts. It is an excellent read and explains the principle of betting the opposite way to public opinion. In the authors opinion this is one of the best ways to make money.
A good example of laying the favourites was England during the 6 Nations Rugby Championships in 2004. There was a massive wave of optimism in English rugby after they won the World Cup in 2003 and the media talked them up to the status of untouchables. They headed into the 6 Nations as odds on favourites, despite the fact that they were missing their captain Martin Johnson, kicker Jonny Wilkinson and numerous members of their World Cup winning team. In my opinion it was debatable as to whether they should be favourites, they were trading at odds of 1.7 at the start of the tournament. Certainly the price was influenced by patriotic punters who listened to the media and had backed them blindly. In this case going against the crowd was a very profitable option.
Over hyped horses who are continually talked about by media pundits, and by punters in message boards, are profitable for laying. But over hyped horses do not appear regularly. Every week there are many over bet favourites. These are going to be the horses with the best form, jockey, trainer, sire, owner etc. They will be the ones which will attract the most money because they look like 'a winner'. The masses of punters out there do not understand value and are only looking for winners. With media pundits only interested in 'winners' too this creates over bet favourites.
Overall, laying favourites can be a profitable strategy, but beware it is not a sure thing!
