Oh but we just all want to enjoy this summer heatwave and ignore everything don't we? That would mean we would miss a very enlightening signal.
Yesterday, Facebook's share price fell by 20%. Cue lots of excitement that the behemoth might be slain; that Zuckerberg might not harbour International Galactic Overlord status now he's only the sixth richest (rather than third richest) person in the world. But curiously the stock markets were not plunged into disaster zone. The . . .