November 15th, 2003, 5:20 am
try itginc.com. You need to explain specifically what u need. i wouldn't worry too much about barra and itg. indeed, they are offering their price impact models to their clients. However,Barra's model is intended for extreme impact of extreme volumes, smth like half of the daily volume. It is an economic model, that has pretty questionable prediction power according even to them and was hardly tested, because you cannot test these volumes directly.Itg has two models, one they might talk about a little -- i think it's called ACT or something, another one, newer -- they won't. They won't go into factors they use, or prediction statistics, or anything like it. Their sites are basically useless for anything beyond general background and some Madahvan articles, which have purely academic bend. Ananth doesn't work for itg anymore by the way.if background is what you need i could try to dig barra book out.