Early Odds to Opening Odds to Starting Price

In this article I will compare the early morning odds (EMO) of horses with their opening show odds (OS) to their final Industry Starting Price (SP), writes Dave Renham. Data has been taken from 1st January 2021 to 31st August 2024 focusing on UK flat racing. This includes both turf and all-weather racing.

To begin with let me look at all horses whose prices have shortened throughout the day. In other words, their OS were shorter than their EMO, and their SP odds were shorter than their OS. For future reference these runners will be known as the ‘shorten/shorten’ group. Here are the figures:

 

 

As we can see there is a healthy strike rate close to one win in every five and a sound A/E index of 0.91, with losses to SP equating to around 12p in the £. When we look at the Betfair SP returns losses reduce to just over 4p in the £.

Let's compare those figures with the same view where the prices drifted all day. Therefore, horses whose OS were greater than their EMO, and their SP's were longer than their OS. I will call this group ‘drift/drift’. Here are their splits:

 

 

As you might expect we see a much lower win rate (roughly one success in every 16 starts), a much lower A/E index of 0.81, and significant losses of 34p in the £. These figures do improve markedly when looking at the BSP returns but losses still are over 12p in the £.

Clearly there are more combinations of price movements than just ‘drift/drift’ and ‘shorten/shorten’. Below is a graph showing the percentage of runners for each ‘price movement combination’.

 

 

As the graph shows, around a quarter of all runners drift from EMO to OS and then drift again when it comes their final SP. This ‘drift/drift’ group contains almost twice the number of runners of the ‘shorten/shorten’ group. That should not come as any great surprise based on what we have seen in previous articles where far more horses drift in price than shorten in price.

Time to go back and dig a bit deeper into the ‘shorten/shorten’ group. Let me share their results based on their EM price range. Prices shown are in decimal form:

 

 

The stats shared in the table show that the shorter the price in the morning the better for these horses that shorten and then shorten again. Horses priced 6/4 or lower in the morning that have shown the ‘shorten/shorten’ profile have got close to breaking even to SP. To BSP they edged into marginal profit to the tune of £13.75 (about 1%). That is impressive, and surprising given the tight nature of the betting market at these very short prices.

It is time now to examine the ‘drift/drift’ group by EMO. Here are their splits:

 

 

We have a similar ‘feel’ here with shorter priced runners in the morning doing the best by far. This can be seen by the correlation between the ROI column and the A/E index column. Once the Early price hits 3.5 or bigger we see a real dip in both columns. Focusing on the horses that had Early Morning Odds of 3.25 (9/4) or shorter, when you look at the BSP returns we see that backing all of these runners would have procured a profit of £46.20 (ROI +1.2%).

Sticking with this subset of ‘drift/drift’ runners that were priced 3.25 (9/4) or shorter early, if we focus on those that had a Starting Price of 5.50 (9/2) or bigger we get these very impressive results:

 

 

These runners have produced a one in six strike rate, an excellent A/E index of 1.08 and returns of over 8.5 pence for every £1 staked. Using BSP the results are naturally better, showing a very healthy +£156.07 profit (ROI +25.1%).

Staying with the ‘drift/drift’ group, let me share the returns on investment for both Industry SP and Betfair SP when we split the results by handicaps versus non-handicaps:

 

 

The graph shows that horses that have the ‘drift/drift’ profile in non-handicap races lose punters far more money than those with that profile which contest handicap races. This graph is a good illustration of the value that can be found on the exchanges these days, and this article hopefully outlines an approach for exchange SP players.

I want to now focus on trainer data to see if any patterns emerge. Let's first look at the trainers with the highest win strike rates when their horses fit the ‘shorten/shorten’ pattern. (A minimum of 100 runners to qualify):

 

 

Seven of the 15 trainers in the table have secured a profit to Industry SP, while a couple of others (Varian and bin Suroor) have made a profit to BSP.

This trainer data includes all price points. But there is going to be a world of difference in terms of long-term performance between horses that have Early Odds of 33/1, Opening Odds of 28/1 and an SP of 25/1, compared with those whose odds went 7/1, 6/1, 5/1. Therefore, as I often do with trainer data, I am narrowing down my focus to horses whose Early Morning Price was a single figure one (e.g. 9/1 or shorter).

Here are the trainer splits for these more fancied runners who fit the ‘shorten/shorten’ profile. (A minimum of 75 runners to qualify this time – ordered by win strike rate):

 

 

Considering we are talking about horses whose prices have shortened during the day these overall results are excellent – much better than I would have anticipated. The profit/loss figures are impressive especially as they are based on Industry SP returns. 14 of the 22 trainers in the table have secured a blind profit to ISP. This moves up to 16 when using BSP. It is also good to see other trainers perform well under these circumstances such as Hughie Morrison, Jim Goldie, Brian Ellison, Richard Fahey and Mick Appleby. Just imagine if as punters we could have predicted this ‘shorten/shorten’ pattern before it happened and backed them all at their early prices! Ah well, at least there's still value in following the money later on with these handlers.

Of course, just because the price of a horse shortens from EMO to OS, does not mean it will continue in that downward direction. In fact, only about 35% of horses that shortened from Early to Opening (with Early Odds of 9/1 or shorter) will continue to shorten from Opening Show to SP. That is, two-thirds of positive early movers will drift back out again before the off.

To finish this piece, I want to look at the ‘drift/drift’ data as far as trainers are concerned. It makes sense to focus again on those horses whose EMO were 9/1 or shorter. The trainers with the top 15 strike rates are shown (min 100 runners):

 

 

As you can see, strike rates are much lower (to be expected), and the P/L figures are generally much poorer, although six of the 15 still made a profit to SP.

As a mathematician, I find market movement analysis fascinating. In the teaching of mathematics, pattern recognition is so important for contextual understanding. In horse racing, finding any patterns within price movements can help in determining the optimum time to place your bet.

Although this article has merely scratched the surface of EMO to OS to SP price movements, there have been some very interesting findings. From my research I feel inspired to do some more digging. And when I do, I will be sure to share it with Geegeez readers.

- DR

 

Other Recent Posts by This Author:

• Seeking Value with Female Flat Jockeys
• Racing Pot Pourri
• Non-handicap juveniles in late turf season
• Price Movement from Opening Show
• Examining the Final Market Rank of Morning Favourites