Thanks, I don't know much about standard deviations but found this really interesting, if a little unnerving.
Also, if you're interested in the workings of the Fed, check out Adam Tooze's new book 'Crashed'. There's a great podcast summary on the LSE website.
Standard Deviations and linear regressions aren't usually traded on alone in a vacuum, but they sure tend to put broad market action into some context.
I definitely am interested in learning anything I can about the Fed, I'll take a look.