https://api.developer.betfair.com/services/webapps/docs/display/1smk3cen4v3lu3yomq5qye0ni/Virtual+Bets

Cross matching has def been a help for the horse racing inrunning but it does not always run as it should. I know when theres a late withdrawn horse in the market and that runner is not taken out then the cross matcher is turned off incase it is corrupted with people backing the non runner.

But theres always a few races (where no horse is withdrawn)where there is some funny inrunning prices matched near the end and its clear the cross matching and best execution worked has not taken place. A race at tramore today where the camera angle changed a few times on the run and there was a close finish - the last prices matched on both the horses were 1.05 and 1.3. Now if the cross matcher was working fine during the race which it seemed to - why did it not work at the end.

Also was a race at aintree or cheltenham a few weeks back - where the fav (mullins horse) looked like it was about to get to get caught in the final 200 yards or so but it kept going and won. On the run in it hit a high or 4.0 while the runner up was hammered into 1.03/04.

Its not a one off - happens prob alot more often than we realise, and can only see it when its a close finish and some funny prices have been matched on the run in. So if the cross matcher works during the race - why is turned off near the end and how much is BF rinsing out the market on a daily basis.

bingo bongo is not correct. to "prove" betfair is the bad boy he has created an example where it may be possible for them to win both sides of a bet.... but this only applies to a small fraction of crossmatched bets where either odds are completely wrong or some risk is not laid of


in general the crossmatcher is a great tool to increase traded volume. also everybody can set up his own cross matcher...and if someone already has he for sure won't volunteer to donate his winnings to a pool distrubuted to competitors...

Fixed is correct anyone can set up there own cross matcher, but not without a delay. Add the resources required and it would be impossible to compete with an in house bot. Thats not to say betfair shouldn't be doing it themselves, but they should be doing so fairly.

Of course it only happens on a small fraction of bets, but together with the rounding errors the revenue is significant going by the Aussie rebate. Also this revenue will grow as xm was introduced to horse racing last year, the volatile in running markets are perfect for bf.

There is no risk of error for betfair, none whatsoever. Just the possibility of extra revenue. In the highly unlikely event of a mistake like setting the market up incorrectly then its voided.
There shouldn't be any xm profits for bf to hand out, the money matched should remain with the bettors via better execution, this is still a p2p betting exchange (just about) after all.

Since when and on what rules bets are reaching the market within second(immediately)just after suspension? On Croatia - Spain game market got suspended for 5 seconds, but someone with 5000 appeared on Ladder within 0.5s jus after market went in play again. Its unfair! Rules are rules!