Originally posted by Temujin
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1) They would not put 100% of the bank into the trade. Why? the data feed they have might have been wrong. ie. some fool sending the data feed pressed the goal button for the wrong team - or perhaps the goal was then not allowed because the player was offside!
2) They would not pay through 20 (or whatever) tick levels as they are uncertain as to where the fair value should be given the new information- they only know the direction. If a team is all ready up 5-0 is another goal going to move the prices more? What about if the market is currently at 2 and a goal is scored- where should the market move to- sure this can be modeled by a poisson process- but you will find that the lamda (expected goal arrival rate) for the two teams is not stable through time and accordingly, is pretty difficult to work out what the market consensus would be as to where the market will settle
3) They are not going to send orders at prices of 1 (backs) and 1000 (lays) because they have complete uncertainty about the prices they will get. Say the market is currently at 2 and a goal will move the market into 1.5. I get a feed saying a goal has been scored and send my order to back at a price of 1 because I will take any price, unfortunately my feed was slow that day and everybody else followed this logic and beat me to the market, by the time my order reaches the market, all the prices down to 1.2 have been cleared out and accordingly my back gets filled at a price of 1.2 which gives it a negative expected value.
4) Even if I knew that for a particular game that the a goal will move prices exactly 20 ticks so I clear out the order book for those 20 ticks. I suspect your chances of greening up will be close to zero, as closing the huge position you have accumulated with no impact will be impossible. I could leave the position open, but then according to your post http://www.geekstoy.com/forum/showth...t=6542&page=11 this opens you up to volatility which gives a good probability of bust.
I agree that prices will quickly reflect any news arrival- and hoovers will take as much as their utility allows them too. However I do not accept they have an unlimited appetite to make the bet -nor the ability to know what the new fair value will be. I certainly do not accept the notion that one individual will move the prices to the new fair value instantaneously courtesy of the market frictions mentioned above.
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