May 4: Unusual Volume Leaders

Published Tue, May 4 20102:59 PM EDTUpdated Fri, Sep 13 20134:33 PM EDT

What follows is a look at stocks in the S&P 500 displaying unusual volume in today's trading session.

Some of the highlights include: CareFusion (CFN), FMC (FMC), Owens-Illinois (OI), McKesson (MCK) and Emerson Electric (EMR).