New Posts For Thread: Deduction Factorhttps://community.betfair.com/horse_racing/go/thread/view/94102/30594693/deduction-factorWould anyone mind to explain how this is calculated? It can't be 1/average price matched nor 1/last price matched. This week a horse that was matched mostly at 4s had a reduction factor of 33%, how is that possible? I tried google and forum search...As if.https://community.betfair.com/horse_racing/go/thread/view/94102/30594693/deduction-factor?post_id=546389021#546389021As if.Thu, 01 Oct 2015 06:38:57 -0500yes that as well. At least it's transparent the way it is, although they could be a lot quicker removing withdrawn horses. I often wonder if the betfair bot is up to something sinister in these scenarios.https://community.betfair.com/horse_racing/go/thread/view/94102/30594693/deduction-factor?post_id=546389015#546389015yes that as well. At least it's transparent the way it is, although they could be a lot quicker removing withdrawn horses. I often wonder if the betfair bot is up to something sinister in these scenarios.Thu, 01 Oct 2015 06:37:39 -0500Or, indeed, might be much lower Dave.https://community.betfair.com/horse_racing/go/thread/view/94102/30594693/deduction-factor?post_id=546388903#546388903Or, indeed, might be much lower Dave.Thu, 01 Oct 2015 06:20:13 -0500It is calculated roughly by 1/odds (eg in a 100% book of 3, 3, 3, when one is withdrawn the deduction factor is 1/3 so the remaining runners are priced 2 and 2 - there might be some averaging, but its irrelevant to the flaw in the system which is thahttps://community.betfair.com/horse_racing/go/thread/view/94102/30594693/deduction-factor?post_id=546388877#546388877It is calculated roughly by 1/odds (eg in a 100% book of 3, 3, 3, when one is withdrawn the deduction factor is 1/3 so the remaining runners are priced 2 and 2 - there might be some averaging, but its irrelevant to the flaw in the system which is thaThu, 01 Oct 2015 06:15:36 -0500... and Betting Volume.https://community.betfair.com/horse_racing/go/thread/view/94102/30594693/deduction-factor?post_id=546388679#546388679... and Betting Volume.Thu, 01 Oct 2015 05:52:35 -0500So the two variables there are Last price matched and book %https://community.betfair.com/horse_racing/go/thread/view/94102/30594693/deduction-factor?post_id=546388605#546388605So the two variables there are Last price matched and book %Thu, 01 Oct 2015 05:42:11 -0500Reduction Factor 6.67%Betting summary - Volume: £199Last price matched: 15.50Projected Betfair Starting Price: 14.759091https://community.betfair.com/horse_racing/go/thread/view/94102/30594693/deduction-factor?post_id=546388171#546388171Reduction Factor 6.67%Betting summary - Volume: £199Last price matched: 15.50Projected Betfair Starting Price: 14.759091Thu, 01 Oct 2015 04:14:08 -0500Doesn't appear so:Reduction Factor 6.67%Betting summary - Volume: £195Last price matched: 15.00Projected Betfair Starting Price: 12.978715https://community.betfair.com/horse_racing/go/thread/view/94102/30594693/deduction-factor?post_id=546388161#546388161Doesn't appear so:Reduction Factor 6.67%Betting summary - Volume: £195Last price matched: 15.00Projected Betfair Starting Price: 12.978715Thu, 01 Oct 2015 04:11:34 -0500Isn't it as simple as turning Betfair's Projected Betfair Starting Price into a percentage ? (100 / Projected Betfair Starting Price) = Reduction factorhttps://community.betfair.com/horse_racing/go/thread/view/94102/30594693/deduction-factor?post_id=546388063#546388063Isn't it as simple as turning Betfair's Projected Betfair Starting Price into a percentage ? (100 / Projected Betfair Starting Price) = Reduction factorThu, 01 Oct 2015 03:47:59 -0500Might be wrong, but have got a feeling it's 'classified'.'A secret recipe'... (Bit like a master butcher's recipe for black pudding etc.)https://community.betfair.com/horse_racing/go/thread/view/94102/30594693/deduction-factor?post_id=546387903#546387903Might be wrong, but have got a feeling it's 'classified'.'A secret recipe'... (Bit like a master butcher's recipe for black pudding etc.)Thu, 01 Oct 2015 03:05:01 -0500