High-speed traders feud over nanosecond advantage

Some super-fast trading companies are arguing with a big trading place called Eurex.

They are fighting over a trick that helps them make trades just a tiny bit faster—about 3.2 billionths of a second.

This trick involves sending useless data to keep their connection to Eurex ready, so they can react quicker when something important happens in the market.

One company, Mosaic, says this trick has made other companies a lot of money and that it's not fair.

Eurex says Mosaic's claims aren't true, but they are changing their system to stop this trick.

Even though this trick might stop soon, these companies will probably keep looking for other ways to be even faster.