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This reminds me of an episode of QI, in which Johnny Vegas, who usually throws out random answers for the humor, actually managed to get a question (essentially) right.
An interesting corollary of the efficient market hypothesis is that, neglecting overhead due to things like brokerage fees and assuming trades are not large enough to move the market, it should be just as difficult to lose money trading securities as it is to make money.
Here's the new thread for posting quotes, with the usual rules: