aidebaobao

terabytee Wrote:
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> thats the realized profit/loss component
>
> (EP-Previous day close)/BM price

Where is it in the book?

It seems that the market impact is no more than the realized loss. Or the realized profit/loss is the best estimate we can get.

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"Market impact is the difference between realized price and the price that would have prevailed in the absence of the order. That cost is inherently unobservable. In an analogy to the Heisenberg principle in physics,..."