The following are two excerpts from today's Wall Street Journal:

-- "Stocks are falling and bond yields are climbing after data showed the economy517,000 jobs in January. Economists surveyed by The Wall Street Journal had expected 187,000 new jobs."

-- "U.S. hiring accelerated sharply to517,000 jobs in January and the unemployment fell to 3.4%, the lowest rate in more than 53 years, the Labor Department said Friday."

Why has the stock market reacted negatively to today's good news about the new jobs added and much lower unemployment rate in January?