In this market SportingIndex simply predict how well every player will perform in the tournament.
The difference between this and their Tournament Index is that every player in the competition counts. The players within the Leaderboard Index correspond with those leading the tournament, so additional players may be priced up as a tournament progresses.
For a typical Leaderboard Index, points are awarded as follows: 1st = 60 points, 2nd = 40, 3rd = 30, 4th = 25, 5th = 20, 6th = 15, 7th = 10, 8th = 5, all others = 0.
Example:
Before the start of a tournament SportingIndex might predict Ernie Els as winning 10-13 points on the basis of the scoring system above. If you fancied Els to do better than 6th (15 points) you would bet high at 13 for the stake of your choice, in this case say £5.
Had he ended up finishing 4th (25 points) you would have made 12 times your stake: (25 - 13) x Your Stake = 12 x £5 = £60. However, if he had struggled with his game and eventually missed the cut, he would have received 0 points on the Leadership Index. As a result you would have lost 13 times your stake: (0 - 13) x your stake = -13 x £5 = -£65.