I'm 39, which might make me old enough to have a perspective. 2008 was a unique, terrifying event. A certain amount of trigger happiness from market watchers is expected. But also, 2008 plus 2001 and maybe 1987 also marks a return to the above "business cycle", previously suppressed by a half century of Keynesianism. Now we can reliably expect capitalists to shit the bed every ten years before we have to rein them in and start over.