The nation's unemployment rate hit a four-year low of 7.5 percent and the job market improved last month. Friday's news helped push the Dow Jones industrial average above 15,000 for the first time.
Was that a rational response?
Although the jobs report for April was positive, what triggered the market reaction was the fact that it was better than expected. Instead of 145,000 jobs created, as most economists predicted, the Labor Department says there were 165,000 new jobs.