their situation is not like ours that place order for a few lots, get the order executed and we are done.
...but much bigger (at times mind-boggling) numbers.
imagine u having to take longs in 10000 nifty lots within a range of 20 points before letting the market move - without creating panic or furor, without disturbing the law and order of the market, without dropping even a hint, without disturbing the price.
........u will sweat at the challenge.
........no doubt, computers help u do that, but u need deep pockets to douse threatening fires, to keep the restless elephants patient.......