Stocks hold mixed on Thursday afternoon as Bristol-Myers Squibb and Celgene push health care higher, while defensive names slip on a spike in Treasury yields.
Stocks fluctuate by late Thursday morning as a rally in Twitter shares fades.
M&A dollar volume is down as dealmakers worry about political uncertainties at home and abroad.
Last week was, by many measures, a good one for Hillary Clinton. It was strong for stocks that might surge under her presidency as well.