By the Numbers

April 15: Unusual Volume Leaders

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: ETrade Financial (ETFC), United Parcel Service (UPS), Apache (APA), Citigroup (C) and WW Grainger (GWW).

>> S&P Stocks Trading at New 52-Week Highs

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