Has anyone managed to discuss this with a IG staff?
The SA40 offering from IG replicates the underlying Safex Alsi40 contract during normal market hours i.e. 8:30 to 17h30. The spread cost is fixed and not variable. When underlying Alsi40 spread is below a minimum threshold, IG spread will be fixed at 10 points, when underlying spread widens they add 4 points either side. The best way to check this is to have the underlying ALsi contract alongside it and compare the spreads, they will be the same except for the fixed spread cost added. When a market loses liquidity it is natural for a spread to widen. Yesterday with US closed, liquidity was lower and might be a reason for a wider spread at times.
The extended hours of their offering see their spread widening to fixed 30 points. This is a cool product if you are worried about gap risk in the morning.
Anyways if you are unhappy or unsure just phone them.
Smurison you seem quite jacked up about IG..
I have one question...will IG bid/spread price be more or less the underlying value of the Alsi TOP 40? If not, why not?