Bsp and ladder odds?

The sport of kings.
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Johnedale
Posts: 47
Joined: Sat Jul 21, 2018 10:28 pm

In Bf historical data the bsp values are sometimes given to over 5 decimal places and sometimes as one of the exact odds values from the ladder. For instance in yesterdays results about one third of the bsps are ladder odds. Anyone know why this happens so often? Are some of the values rounded or is there something about bsp which makes it likely to resolve to a ladder value? Thanks
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ShaunWhite
Posts: 8499
Joined: Sat Sep 03, 2016 3:42 am

I think 3dp is the most I've seen but it depends on the size of the BSP pool. The bigger the pool the more precise the BSP but I'd have to leave a deeper explanation to someone else.
weemac
Posts: 930
Joined: Mon Sep 16, 2013 8:16 pm

It's at least 6 dp and maybe 9 or 10.

23/01/2023 Bazalgette 15.997392

I often wonder about how many settle at exact ladder odds. I can't think of a rational explanation, and betfair always shroud the subject in secrecy.
Anbell
Posts: 1574
Joined: Fri Apr 05, 2019 2:31 am

BSP reconciliation includes volumes from the exchange, so if there is zero BSP to Lay and $1 BSP to back, then BF settles that at the best price available on the exchange so if the exchange is 12/12.5 then BSP will be 12.000000
Johnedale
Posts: 47
Joined: Sat Jul 21, 2018 10:28 pm

Thanks for the replies.

I've found an explanation from bf of how they do the calculations :
https://promo.betfair.com/betfairsp/FAQ ... kings.html

As Anbell said, bf will sometimes use money from the exchange, even when take SP hasn't been selected, and when this happens the bsp will end up as a ladder value.
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