Dow rises 75 points as stocks put together a three-day rally. But Microsoft falls after it announces purchase of Internet calling company Skype.
Radioactive milk, detected in two states, contains tiny amounts of radioactive iodine that probably originated in Japan but pose no health threat. So far, milk sales seem steady.
The Labor Department said Thursday that initial claims for unemployment benefits dropped last week by 4,000, the fourth weekly decline in a row.
Once high-flying firms face three big threats to growth.