Sports Arbitrage Betting
This is where you bet on ALL outcomes of a sporting event. For example, in a football (soccer) match, you would cover home win, draw, and away win. If you cover all outcomes with the same bookmaker, you will LOSE at least 5% of your stake.
However, different bookies have different odds. If you look around, you may well find that you can back all outcomes with different bookies, and still make a small profit, say 5%. Now, you are not going to get rich quick here, but on the other hand, you can’t lose!
Other names for arbitrage betting are “arbs”, “surebet”, and “scalping”.