Investors prepare for warnings
This week, investors will look at the National Association of Purchasing Management Index and the Labor Department's unemployment number for March. The NAPM number is scheduled for release Monday and is considered one of the best indicators of the condition in the factory sector. A reading above 50 is considered a sign of expansion, while a number below 50 signals economic contraction. The unemployment figure is scheduled for release Friday. Economists are calling for the unemployment rate to rise slightly to 4.3 percent.

