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Track Tracts
Favorite Fitness Angles:
Lowest Bounce Point
by Gordon Pine
To echo a point often made by Mark Cramer, when
you can predict change in a horse's performance, you have a real
edge. That's because most handicappers judge a horse on what he did
last race, not on what he's likely to do this race. Hence my
interest in fitness patterns. One important type of fitness pattern
is the improvement and decline of performance based on speed
figures.
Ragozin "sheets" handicappers are experts in this �
they've concentrated on the improvement and regression of horses'
performance over their careers, as defined by their speed figures,
with microscopic detail. Unfortunately, the microscopic lenses which
they use to focus in on patterns of speed figures seem to act as
blinders to everything else that is going on in a horse race, such
as pace, pos position biases, trainer maneuvers, class edges, etc.
The "Raggies" have developed an impressive methodology,
but tend to flirt with dogmatism, trying to explain everything that
happens within the framework of their method. The ups and downs
based on the amount of effort expended in each race is an important
factor. It's just not the only factor.
Anyway, here's another fitness angle that I've used for years: Last
Race Equal or Greater than Lowest Bounce Point. The logic behind
this one is that there is a certain level of performance which will
cause a horse to regress or "bounce" next time. Say you
have a horse with this set of Beyer speed figures in its past
performances (in chronological order): 67, 74, 76, 90, 85, 89, 61.
What I'm looking for is the lowest figure where the horse always
regressed the next race. The horse in this example improved over the
first four races in its pps, then dropped from 90 to 85. He then
improved to an 89, then regressed to a 61. Note that the highest
figure this horse ever improved off of is the 85. The lowest bounce
point has to be higher than that. The next highest number was 89.
That's the "lowest bounce point." Whenever the horse ran
an 89 or higher, he declined next time out.
So, using the Last Race Equal or Greater than Lowest Bounce Point
angle, you calculate a horse's lowest bounce point (if one exists).
If its last race was equal or greater than the lowest bounce point,
you can demote the horse because it's likely to run a worse race
this time. (Please note that I have always restricted this angle to
claiming and maiden claiming races. Maiden special weight and
allowance horses running through their conditions and stakes-level
horses seem to be relatively immune to this factor.)
Here's a small study I did of this angle. I looked at 129 claiming
or maiden claiming performances where the horse's last race was
equal or greater than the lowest bounce point. I restricted myself
to horses where there were at least five races in the pps, so as to
be able to establish a pattern. Here are the results:
Improved: 36/129 28%
+6.2 average improvement in Beyer figure
Same: 7/129 5% NA
Declined: 86/129 67% -13.0 average decline in Beyer
figure
As a control, I looked at a similar group of claiming and maiden
claiming performances without the restriction that the last race was
equal or greater than the lowest bounce point. The result was about
what I expected:
Improved: 92/192 48% +12..6
average improvement in Beyer figure
Same: 11/192 6% NA
Declined: 89/192 46% -11.6 average decline in Beyer figure
In general, claiming and maiden claiming horses tend to improve or
decline at the same rate and by the same amount. When their last
race was equal to or greater than the lowest bounce point, though,
they were 2.3 times more likely to decline than improve in today's
race.
Now for the cautions:
1. These are small samples, meant more to suggest than to prove.
2. The lowest bounce point for each horse isn't set in stone. Each
horse's pps contains too small a sample for that, and there are too
many other things going on to say with certainty that a horse
performed worse because of the effort expended in its last race. The
lowest bounce point is just an educated guess at where the wall
might exist � the wall which having hit, the horse is going to be
the worse for wear.
3. I haven't proved what causes this regression � as Gary
Voekl pointed out on The
Grandstand message board last week regarding a previous fitness
angle, it's possible that what's happening is that most of these
horses are being raised in class after the good performance, and it
might be the class rise that's causing the speed figure decline, not
bounce. I'll look into this in upcoming weeks.
But whatever the cause, the effect seems to be there. In claiming
and maiden claiming races, you should tend to demote horses who ran
a speed figure last time equal to or greater than their lowest
bounce point. NC
Copyright �2001 NetCapper
Inc. All rights reserved.
Track Tracts Archive
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Regaining Control -- New
Favorite Fitness Angle: Competitive Race Last Time by Gordon
Pine
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