race_year | BFSP_min_winning_odds | BFSP_max_winning_odds | BFSP_mean_winning_odds | ISP_min_winning_odds | ISP_max_winning_odds | ISP_mean_winning_odds |
2008 | 1.09 | 1000.00 | 10.91 | 1.00 | 151.00 | 7.64 |
2009 | 1.01 | 475.00 | 10.40 | 1.02 | 101.00 | 7.48 |
2010 | 1.01 | 1000.00 | 10.31 | 1.07 | 201.00 | 7.36 |
2011 | 1.01 | 447.00 | 9.68 | 1.05 | 101.00 | 7.21 |
2012 | 1.01 | 804.00 | 9.80 | 1.04 | 201.00 | 7.12 |
2013 | 1.01 | 548.74 | 9.32 | 1.02 | 101.00 | 6.88 |
2014 | 1.01 | 816.67 | 9.01 | 1.01 | 101.00 | 6.76 |
Feb 19, 2015 -- 1:47PM, pawras wrote:
I had a look at winning horses between 2008 and 2014 in GB and IRE, and compared the ISP against the last price available on betfair before the off, this is what I got
race_year
BFSP_min_winning_odds
BFSP_max_winning_odds
BFSP_mean_winning_odds
ISP_min_winning_odds
ISP_max_winning_odds
ISP_mean_winning_odds
2008
1.09
1000.00
10.91
1.00
151.00
7.64
2009
1.01
475.00
10.40
1.02
101.00
7.48
2010
1.01
1000.00
10.31
1.07
201.00
7.36
2011
1.01
447.00
9.68
1.05
101.00
7.21
2012
1.01
804.00
9.80
1.04
201.00
7.12
2013
1.01
548.74
9.32
1.02
101.00
6.88
2014
1.01
816.67
9.01
1.01
101.00
6.76
I guess the mean average would indicate profit margins have gone down for backers?
You need to factor in the fact that the average field size has been dropping year on year...
http://www.britishhorseracing.com/wp-content/uploads/2014/03/2015-Fixture-List-Industry-Consultation.pdf (see page 14).
The ratio of BFSP_mean_winning_odds/BFSP_mean_odds (or BFSP_mean_winning_odds/Mean_field_size) is what you need to look at.
race_year | BFSP_minwinodds | BFSP_maxwinodds | BFSP_meanwinodds | ISP_minwinodds | ISP_maxwinodds | ISP_meanwinodds | mean_no_of_runners | AVGBFSPdivRUNNERS | AVGISPPdivRUNNERS |
2008 | 1.09 | 1000.00 | 10.91 | 1.00 | 151.00 | 7.64 | 11.05 | 0.987 | 0.691 |
2009 | 1.01 | 475.00 | 10.40 | 1.02 | 101.00 | 7.48 | 10.68 | 0.974 | 0.700 |
2010 | 1.01 | 1000.00 | 10.31 | 1.07 | 201.00 | 7.36 | 10.26 | 1.005 | 0.718 |
2011 | 1.01 | 447.00 | 9.68 | 1.05 | 101.00 | 7.21 | 9.95 | 0.972 | 0.724 |
2012 | 1.01 | 804.00 | 9.80 | 1.04 | 201.00 | 7.12 | 9.82 | 0.998 | 0.725 |
2013 | 1.01 | 548.74 | 9.32 | 1.02 | 101.00 | 6.88 | 9.54 | 0.977 | 0.721 |
2014 | 1.01 | 816.67 | 9.01 | 1.01 | 101.00 | 6.76 | 9.19 | 0.980 | 0.736 |
Feb 20, 2015 -- 11:53AM, Barton Bank wrote:
Sandown, an excellent summing up of the situation.When was the premium charge introduced? I can't remember. I reckon liquidity began to decline from 2008 onwards and sharply from about 2011/2.
20% came in Sept 2008, and the 40-60% band at 250k in June 2011.
However in Feb 2008, the cross-matcher also made it's first appearance (covertly), so 2008 would have seen the first liquidity drop.