Either way, $4.
$4 from the Wall Street Journal's Scott Patterson on Anova, a company working to edge closer to "zero" - as in, zero seconds between when crucial information becomes available (e.g., the $4!) and when the computer knows to execute a trade. $4:
In March, a small Chicago communications company plans to switch on an array of laser devices linking the New York Stock Exchange's data center in Mahwah, N.J., with the Nasdaq Stock Market's data center in another New Jersey community, Carteret.
The lasers, perched atop high-rise apartment buildings, towers and office complexes along the 35-mile stretch between the communities, are the first phase of a grid intended to link nearly all U.S. stock exchanges this way, zipping market data and rapid-fire trades.
Lasers!