![Slowing Down A Stock Exchange With 38 Miles Of Cable](https://hight3ch.com/wp-content/uploads/2019/02/slowing-down-a-stock-exchange-wi-800x440.jpg)
High-frequency traders have a few tactics on stock exchanges: but simply put, they gather price information faster than anyone else, sometimes even faster than the markets themselves, and use that to make a tiny profit many, many, many times. There are all sorts of solutions: but it turns out there’s a simpler one that involves physics.