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Date Unmatched Bid Vol Unmatched Ask Volume Buy Orders Buy Volume (Shares) Avg buy volume per order Sell Orders Sell Volume (Shares) Avg sell volume per order Net buy - sell volume
8/17/2011 24,443,770 14,174,040 15,495 45,949,500 2,965 15,435 35,679,768 2,312 10,269,730
8/16/2011 18,193,700 15,913,950 12,305 31,796,270 2,584 13,496 29,516,520 2,187 2,279,750
8/15/2011 15,366,720 14,034,040 10,536 28,151,240 2,672 11,350 26,818,560 2,363 1,332,680
8/12/2011 18,484,770 16,075,740 12,131 32,178,790 2,653 12,343 29,769,760 2,412 2,409,030
8/11/2011 17,532,860 15,548,460 12,861 33,232,320 2,584 12,456 31,247,920 2,509 1,984,400
8/10/2011 23,282,950 18,443,040 15,451 42,757,220 2,767 13,623 37,917,312 2,783 4,839,910
8/9/2011 14,120,950 21,838,110 14,324 45,905,640 3,205 16,478 53,622,800 3,254 -7,717,160
8/8/2011 14,578,580 18,518,830 12,449 34,508,248 2,772 14,049 38,448,500 2,737 -3,940,250
8/5/2011 19,828,410 22,536,940 12,802 39,826,960 3,111 15,884 42,535,488 2,678 -2,708,530
8/4/2011 22,829,650 14,895,750 17,372 45,570,208 2,623 12,913 37,636,312 2,915 7,933,900
8/3/2011 13,909,280 16,890,240 13,478 35,360,800 2,624 13,652 38,341,760 2,809 -2,980,960
8/2/2011 13,837,740 17,575,470 12,814 32,894,250 2,567 14,283 36,631,980 2,565 -3,737,730
8/1/2011 13,743,640 15,858,120 11,537 29,572,250 2,563 12,831 31,686,730 2,470 -2,114,480
7/29/2011 13,931,360 19,447,940 11,611 29,490,980 2,540 13,380 35,007,560 2,616 -5,516,580
7/28/2011 15,920,670 16,084,070 12,343 30,283,580 2,454 13,070 30,446,980 2,330 -163,400
7/27/2011 15,800,210 15,375,800 13,088 29,707,330 2,270 12,281 29,282,920 2,384 424,410
7/26/2011 14,047,270 16,295,300 12,476 28,552,340 2,289 12,435 30,800,370 2,477 -2,248,030
7/25/2011 11,532,140 16,980,310 9,938 21,939,270 2,208 11,743 27,387,440 2,332 -5,448,170
7/22/2011 14,740,700 17,250,830 12,284 27,365,490 2,228 12,592 29,875,620 2,373 -2,510,130
7/21/2011 15,286,660 19,765,610 11,904 30,624,570 2,573 14,663 35,103,520 2,394 -4,478,950