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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
9/15/2011 42,917,780 43,871,760 30,000 99,210,360 3,307 28,383 100,164,336 3,529 -953,980
9/14/2011 46,607,008 44,166,720 34,337 119,888,328 3,492 33,229 117,448,040 3,535 2,440,290
9/13/2011 66,357,552 23,157,260 35,540 128,592,648 3,618 25,898 85,392,360 3,297 43,200,288
9/12/2011 45,990,752 29,018,000 26,807 91,082,976 3,398 23,024 74,110,232 3,219 16,972,750
9/9/2011 51,247,640 35,651,180 25,861 93,747,184 3,625 26,794 78,150,720 2,917 15,596,460
9/8/2011 46,195,780 28,266,550 27,909 102,005,472 3,655 25,595 84,076,240 3,285 17,929,230
9/7/2011 48,059,040 22,319,730 25,408 89,913,488 3,539 19,758 64,174,180 3,248 25,739,310
9/6/2011 25,219,250 35,616,528 20,025 62,311,260 3,112 23,728 72,708,544 3,064 -10,397,280
9/5/2011 29,661,110 36,457,900 22,879 79,373,040 3,469 26,797 86,169,832 3,216 -6,796,790
9/1/2011 47,742,248 26,370,380 24,993 94,918,624 3,798 24,615 73,546,752 2,988 21,371,870
8/31/2011 40,842,488 33,896,752 22,713 81,465,008 3,587 26,468 74,519,272 2,815 6,945,740
8/30/2011 29,481,650 27,213,610 21,507 69,017,392 3,209 24,088 66,749,352 2,771 2,268,040
8/29/2011 34,731,660 16,967,860 18,985 66,998,152 3,529 18,571 49,234,352 2,651 17,763,800
8/26/2011 24,118,660 27,891,760 16,032 47,262,960 2,948 19,289 51,036,060 2,646 -3,773,100
8/25/2011 28,979,940 19,526,550 17,521 51,917,288 2,963 16,348 42,463,900 2,597 9,453,390
8/24/2011 20,896,800 26,895,480 16,575 46,225,560 2,789 18,587 52,224,240 2,810 -5,998,680
8/23/2011 21,195,040 26,110,860 16,278 46,696,032 2,869 20,295 51,611,848 2,543 -4,915,820
8/22/2011 31,129,310 12,305,570 18,361 59,061,128 3,217 15,246 40,237,392 2,639 18,823,740
8/19/2011 18,807,040 27,969,340 14,226 40,283,820 2,832 20,272 49,446,120 2,439 -9,162,300
8/18/2011 21,816,850 21,242,320 16,232 49,215,500 3,032 19,111 48,640,968 2,545 574,530