What was already a relatively volatile morning as we lead up to the European close, paused for an hour or two until the FOMC statement was released. Immediately, stocks ripped and dipped, the TSY curve started to flatten - pivoting around the 7-10Y, the USD took off, commodities and PMs dropped, and credit cracked wider. Somewhat interestingly, while all this chaos was occurring, ES remained relatively well behaved with regard a broad basket of risk assets - which while not a positive per se, did indicate that this was a very broad de-risking and not simply an overly excitable US equity market prone to vicious dips, rallies, and retracements. It seems very obvious now, and fit with our indications of an exuberant equity market relative to the 2s10s30s fly, credit, and risk in general, that the rally in equities (which baffled anyone with common sense given the background of worsening macro data) was on pure hope and perhaps the sell-off's harshness today will have burned a few fingers as it seems the Bernanke Put strike just moved a lot further out-of-the-money.
UPDATE: Appended some equity-credit relative-value perspective.