Last week, a single trading company you've never heard of, Knight Capital, managed to lose more than $10 million per minute trading stocks -- $440 million in all, in the course of just one morning. That was the result of a trading algorithm gone horribly wrong. And data company Nanex has put together an amazing GIF showing just how out-of-control algorithmic trading has become.
We don't normally think that the stock market has changed in just the past five years, but it has. In 2007, people would issue buy and sell orders only if they genuinely wanted to buy or sell stocks.