Lay Book%

[BetScalper]

What the hell was going on with the Lay Book% in this race ????

[neilb]

There was a late withdrawal, cost me dearly.

[BetScalper]

There was a late withdrawal, cost me dearly.

In-Running ????

[neilb]

Traded out in running.

[Derek27]

There was a late withdrawal, cost me dearly.

In-Running ????

If a horse is a late withdrawal just moments before off the horse doesn't get pulled out of the market until after the race, and reduction factors apply. However, I don't think reduction factors apply to bets place in-play - you get the price you take, so the non-runner (on which all bets will be voided) will distort the overround.

[BetScalper]

There was a late withdrawal, cost me dearly.

In-Running ????

If a horse is a late withdrawal just moments before off the horse doesn't get pulled out of the market until after the race, and reduction factors apply. However, I don't think reduction factors apply to bets place in-play - you get the price you take, so the non-runner (on which all bets will be voided) will distort the overround.

Does this mean BF turn off cross matching ?

[gutuami]

In-Running ????

If a horse is a late withdrawal just moments before off the horse doesn't get pulled out of the market until after the race, and reduction factors apply. However, I don't think reduction factors apply to bets place in-play - you get the price you take, so the non-runner (on which all bets will be voided) will distort the overround.

Does this mean BF turn off cross matching ?

my guess is that they use to, but now they keep it on. in reality only bf knows

[Derek27]

I wouldn't have thought they'd have any need to switch of CM, it would still work. In the graphic you posted it looks like the value was in the back book and backing a selection could have been cross-matched with the lay book, although there was only £3 available on one.

[BetScalper]

Thanks.

Wondering if there is a way in automation to figure out if a runner has been withdrawn.

Presumably by checking its odds ?

[spreadbetting]

If a horse is a late withdrawal just moments before off the horse doesn't get pulled out of the market until after the race, and reduction factors apply. However, I don't think reduction factors apply to bets place in-play - you get the price you take, so the non-runner (on which all bets will be voided) will distort the overround.

Does this mean BF turn off cross matching ?

my guess is that they use to, but now they keep it on. in reality only bf knows

Cross matching gets switched off once there's a non runner, as soon as that's removed from the market it gets turned back on again. If it's too late to remove it before the market goes inpaly then XM is also switched off for the in running market.

Reduction factors don't apply to in play bets so you can imagine it's very easy to manipulate the percentages and betfair would get completely stuffed if they left it on in running

[BetScalper]

Does this mean BF turn off cross matching ?

my guess is that they use to, but now they keep it on. in reality only bf knows

Cross matching gets switched off once there's a non runner, as soon as that's removed from the market it gets turned back on again. If it's too late to remove it before the market goes inpaly then XM is also switched off for the in running market.

Reduction factors don't apply to in play bets so you can imagine it's very easy to manipulate the percentages and betfair would get completely stuffed if they left it on in running

So, if this happens and the lay book% stays above 100
in-running then you can just take free money by laying all runners ?

[spreadbetting]

So, if this happens and the lay book% stays above 100
in-running then you can just take free money by laying all runners ?

No, because your bets on the non runner will be voided. As long as you take the non runner out of the equation you can work out the back and lay books and bet accordingly to make a profit though.

[Derek27]

So, if this happens and the lay book% stays above 100
in-running then you can just take free money by laying all runners ?

In the example you gave you would have been better off backing the field. I don't know what reduction factor was applied but it's likely after removing the non-runner you would have had a back overround of under 100%.

[BetScalper]

So, if this happens and the lay book% stays above 100
in-running then you can just take free money by laying all runners ?

In the example you gave you would have been better off backing the field. I don't know what reduction factor was applied but it's likely after removing the non-runner you would have had a back overround of under 100%.

Thanks,

Racingpost said it was 20p in the £1, so 20%.

[Derek27]

Betfair reduction factors will be slightly different to the bookie's rule 4 as they're based on different prices.