We have a franchise here. Every year we can get a new, revised, set of data-mining, subtly tweaking the deciles and the Sharpe ratios to tilt the recommended strategy toward what worked most recently. Buy one book, but don't keep buying the new calculations: the discussion of Wall Street irrationality is wonderful; but before you trust this book whole-heartedly, read Buffet on why Sharpe ratios (and risk/return considerations) are a dangerous way to approach investing. Read anyone at all on the problem with data-mining. Giving us all the data doesn't change the problem: until these strategies are applied in other markets (Singapore, London, Germany from 1900-1950, say) we won't have an adequate test of how well they work outside of America's particular imperial fortunes. Would a devotion to a long-term all-invested strategy have been sensible in, say, 1930s China? In other words, don't swallow the statistics without some sense of why they happen -- and this book does its best to avoid any consideration of that.