Requests for cellphone debugging exams ($150), in which phones are examined for tracking devices and software, are up, as are sales of Spy Shops’ $1,800 cellphones, equipped with built-in scramblers to prevent conversations from being monitored.

"The SEC drafted the new rules after a lengthy analysis of the "flash crash", which was triggered when a trader using a high-speed trading program placed an order to sell $4 billion of futures contracts."

"A recent paper published in the Physical Review has some astonishing suggestions for the geographic future of financial markets. Its authors, Alexander Wissner-Grossl and Cameron Freer, discuss the spatial implications of speed-of-light trading. Trades now occur so rapidly, they explain, and in such fantastic quantity, that the speed of light itself presents limits to the efficiency of global computerized trading networks. These limits are described as "light propagation delays.""