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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
5/23/2011 9,471,070 20,778,050 14,116 38,141,952 2,702 17,932 49,448,928 2,758 -11,306,980
5/20/2011 15,808,690 19,280,680 16,123 40,599,512 2,518 15,903 44,071,500 2,771 -3,471,990
5/19/2011 14,717,900 18,369,800 15,632 35,205,048 2,252 14,955 38,856,952 2,598 -3,651,900
5/18/2011 19,178,900 18,753,440 17,541 44,513,500 2,538 16,525 44,088,040 2,668 425,460
5/17/2011 16,607,540 20,117,290 15,419 37,247,380 2,416 15,790 40,757,128 2,581 -3,509,750
5/16/2011 14,926,190 21,052,720 14,701 33,514,570 2,280 15,896 39,641,100 2,494 -6,126,530
5/13/2011 19,439,390 18,289,060 15,293 36,045,980 2,357 14,614 34,895,648 2,388 1,150,330
5/12/2011 17,170,560 18,634,050 13,522 31,876,310 2,357 13,365 33,339,800 2,495 -1,463,490
5/11/2011 15,219,050 20,084,540 13,255 30,460,800 2,298 14,283 35,326,288 2,473 -4,865,490
5/10/2011 17,519,660 20,315,970 13,941 31,907,110 2,289 15,228 34,703,420 2,279 -2,796,310
5/9/2011 19,251,770 17,012,600 14,495 35,510,088 2,450 14,059 33,270,920 2,367 2,239,170
5/6/2011 19,707,270 15,702,540 14,281 34,550,860 2,419 13,314 30,546,130 2,294 4,004,730
5/5/2011 14,594,260 18,617,790 13,202 30,636,230 2,321 15,101 34,659,760 2,295 -4,023,530
5/4/2011 14,899,450 17,253,010 12,570 30,818,270 2,452 14,765 33,171,830 2,247 -2,353,560
4/29/2011 24,243,170 18,170,100 15,476 42,795,768 2,765 15,774 36,722,700 2,328 6,073,070
4/28/2011 20,037,650 17,853,340 14,530 36,812,632 2,534 13,701 34,628,320 2,527 2,184,310
4/27/2011 17,291,820 19,271,500 14,946 36,666,768 2,453 14,874 38,646,448 2,598 -1,979,680
4/26/2011 12,718,180 25,141,690 13,699 32,059,960 2,340 18,127 44,483,472 2,454 -12,423,510
4/25/2011 21,693,070 10,394,330 15,375 42,732,408 2,779 13,161 31,433,670 2,388 11,298,740
4/22/2011 14,263,330 20,087,890 15,774 35,391,860 2,244 16,474 41,216,420 2,502 -5,824,560