High-frequency trading -- the questionable practice of making thousands of algorithmic stock trades per minute -- is about to get a big boost in the USA. Anova, a company that specializes in deploying low-latency networks for stock trading, is completing an ultra-high-speed laser network between the New York Stock Exchange (NYSE) and the NASDAQ. The link will be just a few nanoseconds faster than the current microwave and fiber-optic links -- but in the world of high-frequency trading (HFT), those nanoseconds will result in billions of dollars in profits for the trading companies. Such is the insanity of the stock markets; such is the unbelievable capacity of HFT to create money out of almost nothing.