By Matt Dellinger
Posted 04.25.2011 at 1:00 pm 8 Comments
Traders used to all buy and sell stocks in the same crowded room. Everyone received information at the same time, and the first guy to shout or signal got the sale. Today, using algorithms that exploit slightly different prices changing at slightly different speeds, and computers connected to exclusive fiber-optic lines that can buy and sell stocks within fractions of a second, high-frequency traders are able to buy low and sell slightly higher in virtually the same instant.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.