How Market Analysis Fails
"How Markets Fail" by John Cassidy The first two-thirds of this book cover the history of economic thought. It is interesting, and useful, but the author has some fundamental misunderstandings about market theory that undermine his argument. The idea of the efficient market does not mean -- and would be stupid if it did mean -- that every stock is priced correctly. Humans don't know the future, so they cannot be expected to anticipate the future of a corporation. What the efficient market theory says is that the price of a stock reflects all information available at any given time. This doesn't even mean that the price is the "correct" one for a given stock (if one could distill a correct cost based on a company's future profits). It only means that, were any more information to come to light, people would adjust the price they would pay for a stock to account for it. This is basically true by definition. If someone thinks a s...