One stock that jumped was Ancestry.com, the genealogy website, which announced it will be bought by European private equity buyers. The stock popped $2.26 to $31.44. The buyers had offered $32 per share.
Apple also jumped, rising $24.19 to $634.03. The company is expected to release a smaller iPad on Tuesday, to compete with Amazon.com Inc.'s Kindle Fire and Google Inc.'s Nexus 7.
In other trading, the yield on the 10-year Treasury note rose to 1.81 percent from 1.76 percent late Friday. The euro was worth $1.3045, up slightly from Friday. Energy prices fell. Crude oil lost $1.32 to $88.73 a barrel.