By the Numbers

Dec. 21: Unusual Volume Leaders

Stocks Trading 50% Over Their 10-Day Avg.

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:  ConAgra Food (CAG), Walgreens (WAG) and Alcoa (AA).

>>> Best and Worst Stocks of the Decade

Stocks Trading 50% Over Their 100-Day Avg.