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The
New GTX 'Jockey Penalties'
In our previous article
'Does
the jockey really matter?' We suggested that jockeys are one of the
most important factors in racing and therefore betting.
A good
jockey positions his/her rides better, makes superior tactical choices,
conserves the horse’s energy and gets more out of it in the run to the
line. Less
skilful
jockeys are not as capable when it comes to these important attributes and
their shortcomings often cost a horse precious ground and energy. This can
be the difference between winning and losing. If you aspire to be
successful as a punter then you must consider jockeys as an important
element in your decision making process.
The question is then,
how do you accurately determine the ability of jockeys and know that the
decisions you are making will actually lead to increased profit? Most media commentators are biased and ill informed in their opinions about different
jockeys. Regularly published overall strikes rates don't consider
that some jockeys get a much better book of rides than others.
Here at TRB we make a
point of regularly studying and analysing the performance of jockeys for
consideration in our own betting decisions. The good news is that over recent months we have
worked with our programmers to put the best of this intelligence into
a new and advanced Jockey Penalty system, which is now included within
the GTX Program.
An Explanation of the New
GTX Jockey Penalties
In summary, a Jockeys’
Penalty is based on his/her short and long term performance on rides
considered a genuine winning chance by the market. It's
neither fair nor valid
to measure the ability of a jockey on horses that have little chance
of winning the race. Even the best jockey cannot overcome a horse's lack
of ability or fitness and make it give more than it's capable of on the
day.
Another important element to consider is
that the standard of jockeys and therefore competition increases as we
move from Country to Provincial racing and then onto the Metropolitan
area. A jockey with a 20% strike rate in the Country area cannot be
considered to be of equal ability to a jockey with a 20% strike rate in the
Metropolitan area. For that reason each jockey's performance is measured
separately for Metropolitan, Provincial and Country rides and then
statistically normalised to produce a Metropolitan equivalent.
All jockeys are ranked on their normalised
performance and then rated based on their relative standing. The bottom
33% of jockeys is automatically allocated the highest penalty of 5.0. The
remaining jockeys (67% of the total list) are then allocated their penalty
on a percentile basis. For example, the top 10% of remaining jockeys are
given a penalty of zero, the next 10% receive a penalty of 0.5, the
following 10% a penalty of 1.0 and so on.
Below is a shot of the GTX field view screen
that shows a sample of the new GTX jockey penalties.
We can see from the column headed JP
(Jockey Penalty) that both Darren Beadman and
Glenn Boss have a penalty of zero. They are therefore ranked within the
top 6.7% of all jockeys in Australia. Len Beasley has a penalty of 1.5,
which places him in the 20.2% to 26.8% grouping of all jockeys.
Updated monthly
Our new Jockey Penalties are
reviewed and adjusted within GTX at the beginning of each month and
change for each jockey depending on the impact their previous one months
results have had on their overall short & long-term performance.
This methodology and the
consistency of its application makes the new GTX Jockey Penalties an
accurate and reliable way to measure the ability of each jockey. It ignores
media hype that creates the misguided the public perception and focuses on the valid
facts of racetrack performance!
New Jockey Penalty
Performance Statistics
The new GTX Jockey Penalties were first
included in meeting files on 9th July 2005 and
there have since been 1,806 races run prior to publishing this article
(approximately 6 weeks). What insights can we gain from the short
history so far?
The following table shows the strike rate and
profit of all runners sorted
by their relevant Jockey Penalty:
|
Penalty |
SR% |
POT% |
|
0.0 to 0.5 |
15% |
-1% |
|
1.0 to 1.5 |
12% |
-5% |
|
2.0 to 2.5 |
11% |
-16% |
|
3.0 to 3.5 |
8% |
-19% |
|
4.0 to 4.5 |
8% |
-15% |
|
5.0 - |
7% |
-17% |
|
Total |
9% |
-14% |
With an average of 11 runners per race, the
strike rate of all winners divided by all runners is just over 9%. This
table however shows a clear pattern that the lower a horses Jockey Penalty, the higher its
success rate.
This is not surprising given our assertion that the ability
of the jockey has a significant influence on the outcome of each race and
the fact that the most successful jockeys tend to ride the best horses. If
the GTX Jockey Penalties were a reliable indicator of jockey ability, we
would naturally expect to see this strike rate relationship.
More importantly from a betting perspective
though, it would seem that the market might not fully factor in the
ability of the jockey into its prices. For example,
backing every horse ridden by a jockey with a penalty of 0 or 0.5 has so far
returned a loss of just 1% on turnover. On the other hand, jockeys with a
penalty of 3.0 or worse
have returned a 17% loss. If the market were accurate in factoring in the
jockey then we would still see varying strike rates, but the
profit / loss figures would be comparable.
Let's consider some further data that
explores the influence of jockeys and the new Jockey Penalties. The
following table shows the record of 1,806 favourites since the new Jockey
Penalties were introduced:
Favourites by Jockey Penalty
|
Penalty |
SR% |
POT% |
|
0.0 to 0.5 |
36% |
6% |
|
1.0 to 1.5 |
32% |
5% |
|
2.0 to 2.5 |
32% |
2% |
|
3.0 to 3.5 |
29% |
-4% |
|
4.0 to 4.5 |
25% |
-23% |
|
5.0 - |
25% |
-20% |
|
Total |
30% |
-7% |
These early figures are quite remarkable. Favourites represent the best
winning chance in each race and their record is universally consistent
across all facets of racing, in line with this sample, which shows a 30%
strike rate and 7% loss. However these statistics show that performance is
in fact strongly influenced by the ability of the jockey riding.
Those ridden by jockeys with a good record (low penalty) win more and have actually been profitable, while those
ridden by jockeys with a poor record (high penalty) win less and are big losing propositions. That's
powerful evidence to support our views on
not only the importance of jockeys, but also the failure of the market to
reflect that in its prices.
From these statistics then we can draw two
important conclusions:
1. The new GTX Jockey Penalties are
an accurate and reliable indicator of jockey ability.
2. There is potential to exploit the
power of the Jockey Penalties for profit.
Let's simplify our view and split the jockey population into three to
represent a simple jockey classification of good record, moderate
record, and poor record.
The following table shows the record of favourites for each jockey group:
Favourites by Jockey Penalty
|
Penalty |
Group |
% of Jocks |
SR% |
POT% |
|
0.0 to 2.0 |
Good |
33.5% |
34% |
6% |
|
2.5 to 4.5 |
Moderate |
33.5% |
28% |
-8% |
|
5.0 - |
Poor |
33% |
25% |
-20% |
|
Total |
|
100% |
30% |
-7% |
Good jockeys not only win more often, they make for more profitable betting
propositions. It seems the old Pittsburgh Phil
maxim of ‘a good jockey, a good
horse, a good bet... A poor jockey, a good horse, a moderate bet’, still
holds true today.
GTX Ratings
Moving away from the betting market for a moment, let's review the top rated GTX
horse in each race:
GTX Top Raters by Jockey Penalty
|
Penalty |
Group |
% of Jocks |
SR% |
POT% |
|
0.0 to 2.0 |
Good |
33.5% |
30% |
11% |
|
2.5 to 4.5 |
Moderate |
33.5% |
21% |
-21% |
|
5.0 - |
Poor |
33% |
21% |
-11% |
|
Total |
|
100% |
25% |
-6% |
Top rated GTX horses ridden
by a good jockey (in the top 33%) have produced
a 30% strike rate and 11% POT... or $7,100 profit on
$100 bets in the last 6 weeks.
Of course there is no guarantee that such a profit record will continue.
We cannot predict the future that lies beyond the 1,806 races run so far...but
there is certainly a clear and logical pattern that indicates where you
need to focus your attention.
Formline (Weight / Class) Ratings
Historically, Formline handicappers have used Jockey Penalties as
part of their assessment for upcoming races. The penalty for each
jockey is subtracted from the horses base rating and amongst
other penalties & bonuses leads to a nett rating and assessed value
price.
A quick check of our raw Formline ratings shows that top raters
ridden by a jockey with a penalty of 2.0 or less have so far produced a 23% strike rate and 25%
profit. Those ridden by other jockeys have returned a 15% strike rate and 15%
loss.
With an accurate penalty that highlights the ability of each jockey and the
knowledge that the market undervalues their importance, there is
undoubtedly a big opportunity to increase your betting profits!
Increase Your Betting
Profits!
Following are some practical thoughts on how you may be able to use our
new Jockey Penalties to help increase your betting profits:
-
Think long and hard about backing horses ridden by a jockey with a penalty
of 4.0 or above. You must overcome a significant market disadvantage to
start showing a profit.
-
Include the new jockey penalties in your Formline handicapping and price
assessment. They can be a powerful tool to distinguish between runners
that are otherwise closely rated.
-
Favourites ridden by jockeys with a penalty of 2.0 or less have so far shown to
be profitable.
-
Favourites ridden by jockeys with a penalty of 4.0 or higher have so far returned a loss
exceeding 20% and may be considered a
significant risk. Betting around these favourites, particularly on good
chances ridden by good jockeys can be highly profitable.
-
The GTX ratings for each race are complete... as is, so you should not
change them by including the Jockey Penalty as a calculation variable.
Instead, use the Jockey Penalties as an additional decision making tool to
support the GTX assessment. For example:
-
Top rated GTX horses ridden by good jockeys offer an outstanding
starting point for profitable selections. So far they have produced a 30%
strike rate and 11% profit on turnover.
-
Top rated GTX horses ridden by the best jockeys with a penalty of zero
(the top 6.7% of all jockeys) have so far produced a 32.4% strike rate and
19% profit. They are potentially a simple yet highly successful selection
system.
If you have not been considering jockeys in your selection and betting
process then the evidence presented here should convince you that you
can no longer ignore them. Good jockeys are a significant advantage in
racing while jockeys with a poor record are a substantial disadvantage. The GTX
Jockey
Penalties provide a powerful source of racing intelligence that you can
use to accurately distinguish the difference in jockeys’ abilities, and
therefore make more profitable betting decisions. As a minimum, avoiding
betting on jockeys in the lower group and you will certainly increase both your strike
rate and profit!
Footnote: Any reference or categorisation of jockeys as belonging to a good, moderate or poor group is based solely on
comparative statistical analysis of winning strike rates from rides
considered a genuine winning chance by the market.
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