Unusual Volume for NASDAQ Stocks

Seeing today's unusual volume on a stock is like seeing people standing in line overnight to buy the latest and greatest gadget or must-have item. Unusual volume tells you something important is going on with a stock, and you should pay attention.
Symbol Company Last Sale Price Change Net / % Share Volume Volume % Change
ATHLON ENERGY INC. $ 42 1.07  ▲ 2.61% 8,408,034 1212%
Diamond Resorts International, Inc. $ 18.17 .83  ▲ 4.79% 1,965,364 740%
Plexus Corp. Plexus Corp. $ 43.52 3.24  ▲ 8.04% 638,422 345%
Insteel Industries, Inc. Insteel Industries, Inc. $ 23.95 3.46  ▲ 16.89% 266,751 322%
Knoll, Inc. $ 18.28 1.46  ▲ 8.68% 687,378 292%
Esterline Technologies Corporation $ 107.50 1.22  ▲ 1.15% 792,348 262%
Commerce Bancshares, Inc. Commerce Bancshares, Inc. $ 44.28 .65  ▲ 1.49% 1,197,774 254%
CLARCOR Inc. $ 55.58 .56  ▲ 1.02% 814,664 228%
SanDisk Corporation SanDisk Corporation $ 82.99 7.14  ▲ 9.41% 12,322,060 216%
Sina Corporation Sina Corporation $ 56.55 3.56  ▲ 6.72% 12,705,333 212%
Marten Transport, Ltd. Marten Transport, Ltd. $ 23.23 1.04  ▲ 4.69% 265,897 186%
Boardwalk Pipeline Partners L.P. $ 15.72 .68  ▲ 4.52% 6,470,811 167%
Smith (A.O.) Corporation $ 46.53 .58  ▲ 1.26% 1,999,634 165%
PrivateBancorp, Inc. PrivateBancorp, Inc. $ 29.59 1.70  ▲ 6.10% 1,036,078 160%
Neustar, Inc. $ 29.26 1.04  ▲ 3.69% 2,608,668 154%
Linear Technology Corporation Linear Technology Corporation $ 46.37 1.30  ▲ 2.88% 6,829,565 151%
Lennox International, Inc. $ 89.29 .82  ▲ .93% 938,508 144%
United Rentals, Inc. $ 93.47 1.98  ▲ 2.16% 4,057,421 143%
Spansion Inc $ 18.64 .91  ▲ 5.13% 2,035,023 141%
Baker Hughes Incorporated $ 68.33 2.02  ▲ 3.05% 9,855,384 136%
Nelnet, Inc. $ 43.64 4.33  ▲ 11.02% 238,779 135%
Rambus, Inc. Rambus, Inc. $ 12.31 .52  ▲ 4.41% 2,403,614 134%
Sears Holdings Corporation Sears Holdings Corporation $ 38.33 4.73  ▲ 14.08% 3,628,959 133%
Myers Industries, Inc. $ 24.32 .59  ▲ 2.49% 270,983 133%
MercadoLibre, Inc. MercadoLibre, Inc. $ 86.15 1.51  ▲ 1.78% 1,772,315 124%
Select a security's symbol for a quote summary.
As of 4/17/2014 4:05:00 PM