What follows is a look at stocks in the S&P 500 displaying unusual volume on today's trading session.
Trading volume on Big Lots is up over 290 percent of its 10-day average, following news reports on Monday that the company may be exploring strategic options, including a possible sale.
>> Dow on Pace for 7 Days of Gains
Follow us on Twitter @By_The_Numbers
Send comments to:bythenumbers@cnbc.com