Summer Jumping or Winter Jumping: When Do Jumps Favourites Win?

When I first stood at a rail with a form guide, the old hands told me the winter game and the summer game were different sports. I wanted to test that properly. Does the month a jumps race falls in change how often the favourite wins, and does it change whether backing that favourite pays?

Across 6,986 UK and Irish jumps races with a clear favourite, the market leader won 36.1% of the time. That figure rose to 42.8% in November and fell to 32.4% in June, and the calendar moved the returns too. This file sits alongside my horse racing tips page as background on how much trust a short price deserves at different points of the season.

Window 1November is the peak month for jumps favourites

The line chart sets jumps favourites against Flat favourites month by month. Over obstacles the line swings far more. November stands clear at 42.8% from 760 races, February is also strong at 39.7%, and June is the trough at 32.4% from 447 races. Flat favourites, across 12,412 races, stay in a tighter band between 31.2% and 36.5%.

For a bettor that spread matters more than the overall average. Overall, jumps favourites won 36.1% against 34.0% on the Flat, but the jumps figure depends heavily on the time of year.

My reading is that November brings proper horses back on proper ground, and the market knows exactly who they are. In June the summer cards are a different population of horse, and a short price rests on thinner evidence.

Window 2Returns turn positive in November and slump in June

This chart shows what happened if you put one unit on every jumps favourite at SP, with commission taken from winnings. Over all months that lost 3.4%, which is roughly what you expect from a market that is broadly efficient. November returned +5.7%, June returned −13.8%, and December was also well below zero.

A few summer months crept just into profit, as did February. Most of the rest sat below zero, with October at −8.3% standing out because it comes right before the best month of the year.

I would not build a plan on blindly backing November favourites. The useful lesson is that the worst months are very poor, and in June I want a stronger reason than position in the betting before I back the favourite.

Window 3Autumn hurdlers beat their price while spring chasers fall short

Each row compares what the SP said a favourite's chance was with how often it actually won, split by season and by hurdles or chases. Autumn hurdle favourites were priced at 39.6% and won 41.6%. Summer chase favourites also beat the market, winning 35.7% against 33.7% priced. Summer hurdle favourites went the other way, winning 33.9% against 35.3% priced.

Spring chase favourites fared worst relative to their price, priced at 34.6% and winning 32.4%. Midwinter hurdle favourites, at 38.4% from 1,145 races, were close to their price.

Every gap here is smaller than the error bars on the chart, so I treat these as leanings rather than rules. Still, summer chasers outperforming summer hurdlers fits what I see. Chase form over fences tends to hold up better than hurdle form on quick ground.

Window 4Summer jumps fields are bigger, which spreads the chances

Field size is the quiet variable behind much of this. Jumps races were largest in July at 10.2 runners and smallest in February at 8.3. Summer jumping as a whole averaged 9.4 runners per race.

More runners means more ways for a favourite to get beaten, and more each-way value further down the market. That is where I prefer to look in the summer months.

The fit is not tidy, though. November fields were small and favourites thrived, but July was the biggest month without being the worst for favourites. Field size explains part of the pattern, not all of it.

Window 5Autumn is the only window that broke even

The table pulls the year into four windows. Autumn favourites won 39.5% from 1,295 races at fair odds of 2.53 and returned 0.0%, the best of the four. Midwinter came in at 36.5% (±2.1) and −4.0%, summer jumping at 34.6% and −3.1%, and spring at 34.8% and −6.0%.

Spring is the window I find most interesting. It includes the big festivals, where fields are competitive and favourites tend to be overbet, and here they returned the least.

The main caveat matters here. This is only about two seasons of data, and for most of that period the first twelve days of each month are missing, so one busy meeting can move a monthly figure noticeably. Going is not recorded either, so month is standing in for ground and for the type of horse in training.

Written bySeung-min Yoon

I'm Seung-min Yoon, and I write the horse racing tips at fixedmatches.vip — reading form, going and pace setups rather than chasing the name at the top of the market.

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