Interesting read:
THE ASTONISHING RISE OF FRANKEL GOES ON
Taken from an article in Thoroughbred Racing Commentary by James Willoughby, 14th September 2017
Two more Group winners for
FRANKEL (he had seven runners this week, and three thirds as well) have catapulted the all-time great racehorse to world #4 stallion - up three places this week. This is unprecedented and - in rankings terms - exciting.
To the maths behind the rankings,
FRANKEL is just a collection of 74 Group race results. It does not know that this scant sample has been achieved by one of the best racehorses in history and that he is being patronised by some of the best mares around, increasing his probability of long-term success.
But the maths can still identify
FRANKEL is something special because – at this stage of his career – there hasn’t been a stallion like him.
A sample of 74 runners is a small one, and TRC Global Rankings is mindful of the risk in these things. It seeks not to make a splash in, hurriedly jumping on one bandwagon or another, but to minimise errors in predicting the results of future Group and Graded races.
This is extremely important to note: if
FRANKEL was placed any lower than #4, on the basis it is ‘too soon to tell’, reached either mathematically or otherwise, the probability of ranking one of his sons or daughters too low in a future Group race increases.
While it seems like 74 runners is not a lot, in terms of mitigating risk it is a lot more significant than 54 or 44 runners: we have reached the point where the maths is screaming "this is not a fluke".
To remind you what we have detailed before,
FRANKEL's record of 19 Group wins from 74 global runners is represented by a strike rate of 25.7 percent. For comparison, Galileo's strike-rate is 17.1 percent and Dubawi's 17.6 percent.
Now, strike rate is nowhere near the most important consideration for TRC Global Rankings. The first and most important statistic for a stallion is simply the number of runners he has been represented by in Group and Graded races, for we are dealing here with the cream of the crop of all Thoroughbreds worldwide, and to even get a runner into a Group or Graded race is somewhat predictive of future success.
But let’s talk strike rate just for a second here, for it is a widely understood metric that isn’t that misleading applied in this spot. As the sample size of a stallion grows, his strike rate becomes less noisy and approaches a stable number. One of the things TRC Global Rankings is doing is answering the question: “How is a stallion doing in terms of his win rate at this stage of his career? And how much trust do we place in him continuing to do it?”
FRANKEL's strike rate is only the 49th best among the 500 we consider the best in the world right now. The best belongs to Twice Over: 1-1 or 100%.
Of the 48 sires with a higher strike-rate than Frankel:
A total of 34 have had ten runners or fewer
A total of nine have had 11-20 runners
The remaining few have had 23, 29, 29, 35 and 54. (The 54, impressively, is Japanese sire Screen Hero.)
None has had close to 74.
At his present strike-rate of 25.7 percent, it is 3,522,311,669 – 1 that
FRANKEL doesn’t have a winner in his next 74 runners, which is more than 700,000 times less likely than Leicester were rated to win the Premier League title in 2016.
There is no need to go on, but we cannot resist a geeky exercise. What if we took 74 runners at random from the 1,651 that
FRANKEL’s sire Galileo has had since 2011, and counted the number of Group winners in the sample? What percentage of a million repetitions of this exercise would have 19 winners or more, like
FRANKEL?