Leave their "fancy technology" in place...just introduce a transaction tax high enough to force them to hold positions overnight. If a trader, HFT or otherwise never holds any trades overnight, then, they are of no value to the market.
From the large overnight gaps in the last few years, what's obvious is that the US market has tons of intraday players screwing each other during the day and substantially less willing to hold positions longer than mere minutes.
One of the dumbest posts I've ever read on here. How can you call yourself "risktaker" when you advocate solutions only a communist or fascist could love.
Please, go back to T-Bills. You would have some value in that market, its more your speed.
