I'm with darky I don't exactly follow what your saying. I think what you mean is AAP prepost market is sometimes up around the 150% mark while the Tatts market is usually around the 115-120% mark. So that way the AAP prices are generally speaking going to be lower than the Tatts prices most of the time due to the framed market %'s.

If your going to compare the AAP prepost, any other prepost or your own ratings to Tatts for example you should always re-calculate them to a 118% market or thereabouts. I do mine to 115% just for ease but then you can actually compare them appropriately (apples for apples we say at work) instead of comparing a banana (150% market) to an apple (118% market).

I hope the above is what you were basically getting at, otherwise i've misunderstood your post more than i thought.