What is documented here is extremely difficult to do in markets that encourage transparency. It was done a lot in the early 1900s before the data became more accessible, much to the chagrin of many an investor (if you haven’t, you MUST read Reminiscences of a Stock Operator which is an excellent lesson) but to see it done in more modern times given exchange laws and transparency is quite a coups. Not sure whether to be scared or hat tip ze Germans.
(via Hacker News)