Laying favourites is one of those strategies that sounds easy: pick a short-priced runner, bet against it, collect when it loses. Around two-thirds of all favourites lose their race, so what could go wrong?
Plenty, as it turns out. The reason most lay-the-favourite punters fail isn’t that they pick the wrong horses. It’s that they don’t understand the price structure, and they treat every favourite the same way.
This guide covers when laying actually works, how to assess a favourite for vulnerability, and the price discipline that separates a strategy from a slow drain on your bank.
The maths problem with laying
Before the strategy, the maths. A favourite at $3.00 has roughly a 33 per cent implied chance of winning. To lay it on Betfair, you need to risk roughly $2.00 to win $1.00 (after commission). Win three of these in a row and you bank $3. Lose one, and you’re down $2.
That ratio is the entire game. If your true read on the race tells you the favourite has, say, a 40 per cent chance of winning rather than the implied 33 per cent, laying it is a losing proposition no matter how many times you do it. If your read is closer to 25 per cent, laying it is profitable.
So the question isn’t, will this favourite lose. It’s, is this favourite priced shorter than its true chance.
The eight criteria for assessing a favourite
Go through the form on a favourite the same way you’d build a positive case for any horse, but specifically looking for question marks.
1. Class
Has the horse won at this level, or is it stepping up? Class rises are one of the most reliable sources of vulnerable favourites. Stable bias and previous-meeting form drive them down to short prices, but the class rise is the variable the market often underrates.
2. Track
Has the horse won at this track, or one with similar characteristics? Tight tracks (Moonee Valley, the Gold Coast) ride very differently to sweeping tracks like Flemington. A horse that’s a Caulfield specialist isn’t necessarily a Randwick horse.
3. Distance
Has the horse competed at this distance? A horse stepping up from 1200m to 1600m for the first time is a different proposition to one already proven over the trip.
4. Going
Has the horse handled today’s track condition? This is one of the most reliable sources of vulnerability. A favourite that’s never seen a Heavy 9 is a question mark on a wet track, regardless of its dry-track form.
5. Recent form
Look at the last three to five runs. Has the horse been racing well, or is it coming back from a break? Returning from a layoff is often the gap between market expectation and current ability.
6. Trainer form
Is the trainer in form? A trainer with two winners and three placings in the last 14 days is on, and their runners typically deserve their short prices. A trainer in a cold streak is harder to back at any price.
7. Jockey
Apprentice in the saddle on a weight-for-age favourite? Stable jockey not riding for the first time in months? Jockey changes are public information that often drives prices, but the implications aren’t always priced in correctly.
8. Draw
In sprint races particularly, the draw matters. A favourite drawn wide on a tight turn is often vulnerable, because the rider has to use up petrol getting across, or accept a worse trip.
How to combine the criteria
A single question mark isn’t enough. Almost every horse in a race has one or two boxes left to tick. The combination is what matters.
A working rule: if a favourite has three or more credible negatives across the eight criteria, it qualifies as vulnerable. Two negatives is a maybe, only if the price is genuinely poor. One negative is just a normal horse, and the favourite is probably the right favourite.
The price question
Even a weak favourite isn’t always a lay. The lay price is always higher than the back price (the spread), and on Betfair you pay commission on profits. So a favourite at $3.00 to back is typically $3.10 to $3.20 to lay, and your effective return after commission is around 95 per cent of stake.
The maths above (lay-the-favourite is profitable when the implied price is shorter than the true chance) needs to factor this in. As a working guide:
- If you read the true chance as 5 per cent worse than the implied price, the lay isn’t worth it. Margin too thin.
- If you read it as 10 per cent or more worse, it starts to make sense.
- The shorter the lay price, the more reliable your read needs to be.
Laying a $5.00 favourite where you have a strong negative read is a different calculation to laying a $1.50 favourite. The former tolerates more variance. The latter you need to be very confident on.
A worked example
Saturday at Flemington, 1400m. The favourite is at $2.30, a four-year-old returning from a 12-week spell on a track it’s only raced on once before, with a soft track downgraded to Heavy 8 overnight. The trainer is on three placings from 14 runs in the last 14 days.
Question marks:
- Returning from spell (recent form)
- Track condition has shifted (going)
- Limited track experience
- Trainer not firing
That’s four credible negatives. The lay price is around $2.40. If the true chance is closer to 35 per cent than 43 per cent, the lay has positive expectation. Worth a position with disciplined staking.
Common mistakes
Laying every favourite. The market is generally pretty efficient. Most favourites are priced about right. You’re looking for the exceptions, not painting the whole field.
Ignoring the price. A weak favourite at $1.40 is still a poor lay if the true chance is 65 per cent. Read and price both have to align.
Going too big. Laying favourites means risk-to-stake of two or three to one, sometimes more. A losing run on heavy stakes drains a bank quickly. Treat lay stakes more conservatively, not more aggressively.
Doing it on every meeting. If the form is messy or you don’t have a clear read, skip the race. There’s no obligation to find a lay every Saturday.
Gamble responsibly. If you or someone you know needs help, contact Gambling Help Online on 1800 858 858 or visit gamblinghelponline.org.au.