Global markets priced in 85 billion QE, monthly. Bernacke and now Yellen Fed announced taper, and seem to be committed. Global sell off is a reflection of market pricing in future expectations at 30-85 Billion LESS QE, per month. This is deflationary across all asset classes/markets. IOW, this should be the start of a decent global correction. European and other insolvent nations teetering, could be pushed back into crisis. At least until Yellen/Fed make overtures of taper pause, and/or restart. My 2cents.
Edit: watch headline numbers and earnings announcements. All will start to disappoint.