Soldato
- Joined
- 5 Aug 2006
- Posts
- 11,376
- Location
- Derbyshire
Aye, you do need to be discerning. Ideally a bare minimum of runners with clear favourites and low qualifying losses. You see some people chasing these offers or worse (2nd to SP) in some very unlikely races.
Does the opportunity to minimise variance readily exist?
If the refund is for horse coming second a £25 bet can be worth it if the qualifying losses are <£2. If your odds are on average 8.0 then your horse will come second (massive assumption here) around 12.5% of the time (1 in 8). If you lose £2 per time but when you do with you retain £20 of the £25 SNR bet then you will on average only make 50p per race. Keep your qualifying losses to £1 then you make an average of £1.50 per race. Keep your qualifying losses to £0.50 and you make an average of £2 per race.
Note that if the refund is for horse coming second to the SP (favourite) a £25 bet can be worth it if the qualifying losses are very low. Very low chance of hitting the free bet.
In both cases obvioiusly don't bother with horses with high odds as the chance of them coming 2nd is very low. Back a horse at odds of 5.0 and it has a ~20% chance of coming second.
Forgive me if my maths is off. Long day!
A very important thing to remember is I have now lost many a Saturday afternoon matched betting on horse races and hardly ever manage to hit a refund. You need to back a horse 5 mins before the race when you see the odds dropping on the exchange, as bookmakers are slow to update their odds.