RENEE MONTAGNE, Host: NPR's business news starts with a shutter running through global markets.</s>RENEE MONTAGNE, Host: The index quickly recovered and ended the day down about 350 points or three percent. The reasons for the sudden selloff are still unclear. The Wall Street Journal and The New York Times suggest that glitches in high-speed computer trading systems may have played a part. Analysts also pointed to anxiety surrounding the Greek debt crisis.
U.S. stock prices were flat Friday morning after some positive economic news from the government. The U.S. Labor Department said employers added 290,000 workers to payrolls last month, many more than economists had expected. It's welcome news after Thursday's stunning plunge in the Dow Industrial Average. The unemployment rate, however, rose from the previous month, to 9.9 percent.