For each race meeting Sporting Index offers markets on how an individual jockey will perform.
This is similar to the favourites markets with 25 points awarded for a winning ride, 10 for a second, 5 for a third and 0 points for any other place. If the jockey on whom the market is offered does not ride his intended mount in a race, but the horse still runs, then the horse's finishing position still counts as if it had been ridden by the named jockey.
Here's an example. At a meeting at Epsom, Jamie Spencer has six rides. Sporting Index might predict that he will get between 41-44 points based on the scoring system above.
If you viewed his rides as particularly strong and believed he might have two winners with a good chance of others finishing in the frame you would bet high at 44 for say £2 per point.
Here are the results of Spencer's six rides:
Race 1 Unplaced (0 points)
Race 2 Unplaced (0)
Race 3 3rd (5)
Race 4 1st (25)
Race 5 Unplaced (0)
Race 6 1st (25)
Total = 55 points
With these results had you gone high at 44 you would have won 11 times your stake: (55 - 44) x your stake =11 x £2 = £22. But, if Jamie Spencer had only managed one winner and failed to make the frame on the other five rides, the make-up would be 25 points which, with the same bet, would have lost you 19 times you stake: (25 - 44) x your stake = 19 x £2 = -£38.