Here's an interesting one:
The aussie TAB have the following odds:
NZ $1.50
AS $2.40
the NZ TAB has
NZ $1.70
AS $2.10
(Ok interesting because in Aus. NZ is the preferred team! :)
Interesting also because if one placed the following bets:
NZ @ 1.70 (with the NZ TAB)
AS @ 2.40 (with the Aus TAB)
The total odds here are $4.10 or, and one would think, a risk free return of $2.05 (5%) would be possible.
Unfortunately this does not work. The closest you get is to bet 59% of your money on NZ and 41% on Aus. This would provide a risk free net return of -1%.
(not great)
On exploring the numbers it appears that even while the net of the two odds are > $4 (4.10), the returns diminish as the difference between the two odds increases - to a point that a difference of > 15% between the individual odds (against the sum of both odds) returns a loss.
Not being a mathematical guru, I am at a loss to explain this - but suffice to say, I'll be opening an account with an Australian TAB (I already have a NZ TAB account) and watching for any positions in which different odds are being offered, the sum of those odds is >= $4.10 and the difference between them is <= 15% of $4.10.
Moreover, the AB's will beat the Aussies tonight in a proud return to form in order to restore their pride.
Go the ABs!
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