The theory is that it mutes volatility.Quote from TonySanDiego:
and.. that is ??????
Although there is no question that the volatility is down from the dot-com years, I would not be surprised to find that, if you compare percentage (momentum) moves of today with percentage (momentum) moves pre-dot-com era, that they would pretty much coincide.
People want to blame everything on pennies. Usually those people were not trading back pre-'98.
My guess is they had an effect, but not nearly as much as people attribute to them.
nitro