I have an automated program rather than watching the markets everyday so have not 'seen' this happening however one of the possibilities I considered was that it could be a means of 'tripping' someone's bot particularly if they used WoM as an indicator. However I think WoM have very limited application anyway.
From your description it seems a very short-term 'spoof' which is why I thought it may be targeting bots rather than humans. Interesting stuff.
8.10 Cartmel
A post from way back in 2008 ! May provide an answer to some "wild" programmes !!! If things have progressed since then !
Do Betfair employ traders to bet in their markets?
There is a trading team based in Malta which manages the risk around the multiples product. They have software which tells them what the risk is associated with a potential result is and suggests what hedge bets can be placed to mitigate that risk at current exchange prices. They then place the hedge bets to manage the risk. They place the bets using the same software as everyone else using the site and respecting any in-play delays.
The multiples product is run under Betfair’s Maltese bookmaking license and is regulated by the LGA there. Therefore the team has to be based in Malta. The operation is an arms-length operation – there is no special access to any functionality or data from the exchange. Betfair Malta is charged commission on winning bets in the same way as any other customer in order to comply with relevant regulation and law.
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Betfair Customer Services 19 Mar 18:05
Do Betfair employ traders to bet in their markets?
There is a trading team based in Malta which manages the risk around the multiples product. They have software which tells them what the risk is associated with a potential result is and suggests what hedge bets can be placed to mitigate that risk at current exchange prices. They then place the hedge bets to manage the risk. They place the bets using the same software as everyone else using the site and respecting any in-play delays.
The multiples product is run under Betfair’s Maltese bookmaking license and is regulated by the LGA there. Therefore the team has to be based in Malta. The operation is an arms-length operation – there is no special access to any functionality or data from the exchange. Betfair Malta is charged commission on winning bets in the same way as any other customer in order to comply with relevant regulation and law.
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Betfair Customer Services 19 Mar 18:05