News the FBI is reopening its investigation into Hillary Clinton's email use as Secretary of State rocked markets Friday. Many Clinton-friendly stocks were in the red as well.
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.