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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
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
4/21/2011 13,288,340 18,855,760 14,318 30,222,960 2,111 14,814 35,790,380 2,416 -5,567,420
4/20/2011 17,427,000 18,382,970 14,832 33,879,980 2,284 14,512 34,835,952 2,400 -955,970
4/19/2011 20,109,790 18,490,760 15,998 36,561,240 2,285 14,474 34,942,208 2,414 1,619,030
4/18/2011 12,174,580 21,419,220 15,420 34,432,472 2,233 16,750 43,677,112 2,608 -9,244,640
4/15/2011 15,373,330 22,373,410 16,497 37,474,600 2,272 17,566 44,474,680 2,532 -7,000,080
4/14/2011 16,371,370 19,212,760 15,761 34,850,440 2,211 15,402 37,691,832 2,447 -2,841,390
4/13/2011 14,730,770 20,223,100 13,820 30,253,550 2,189 15,954 35,745,880 2,241 -5,492,330
4/8/2011 22,407,220 23,874,570 16,026 40,142,088 2,505 18,921 41,609,440 2,199 -1,467,350
4/7/2011 22,218,850 31,314,650 16,618 44,119,820 2,655 24,065 53,215,620 2,211 -9,095,800
4/6/2011 33,593,368 17,868,600 19,507 56,655,312 2,904 18,007 40,930,540 2,273 15,724,770
4/5/2011 28,982,330 20,869,510 17,084 46,278,400 2,709 15,682 38,165,580 2,434 8,112,820
4/4/2011 22,218,620 23,335,770 16,696 41,297,432 2,473 16,494 42,414,580 2,572 -1,117,150
4/1/2011 24,735,730 23,233,260 19,017 44,525,448 2,341 16,886 43,022,980 2,548 1,502,470
3/31/2011 24,469,780 26,857,720 18,766 44,838,472 2,389 18,604 47,226,408 2,539 -2,387,940
3/30/2011 32,283,230 24,709,120 22,888 56,299,920 2,460 18,266 48,725,808 2,668 7,574,110
3/29/2011 23,770,030 30,080,820 22,051 51,561,860 2,338 22,057 57,872,648 2,624 -6,310,790
3/28/2011 24,044,030 27,141,020 18,482 44,331,220 2,399 19,493 47,428,208 2,433 -3,096,990
3/25/2011 28,583,070 30,368,310 22,864 53,150,048 2,325 21,796 54,935,288 2,520 -1,785,240
3/24/2011 29,191,340 32,495,150 22,807 54,046,088 2,370 23,379 57,349,900 2,453 -3,303,810