Friday Was a 90/90 Day and What It Means

When more than 90 percent of of the prices and trading volume is down, the market is in clear retreat.

Last week ended on quite the down note. Friday's big selloff saw the Dow Jones Industrial Average drop 2 percent, or 318.2 points. The Standard & Poor's 500 Index fell 2.1 percent (38.2 points), while Nasdaq Composite Index declined 2.2 percent (90.7 points).

To continue reading this article you must be a Bloomberg Professional Service Subscriber.