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
12/20/2012 55,204,960 55,617,792 26,101 116,487,008 4,463 27,630 116,899,840 4,231 -412,830
12/19/2012 66,749,340 37,395,072 29,150 131,269,880 4,503 22,585 101,915,608 4,513 29,354,270
12/18/2012 41,029,088 55,841,100 21,264 85,385,032 4,015 23,836 100,197,040 4,204 -14,812,010
12/17/2012 52,029,020 40,992,768 23,043 96,572,448 4,191 21,459 85,536,200 3,986 11,036,250
12/14/2012 44,673,232 48,923,680 20,739 79,898,600 3,853 22,004 84,149,048 3,824 -4,250,450
12/13/2012 41,028,480 51,728,048 21,442 82,680,720 3,856 23,541 93,380,288 3,967 -10,699,570
12/12/2012 54,651,520 37,844,352 24,159 100,577,368 4,163 22,254 83,770,200 3,764 16,807,170
12/11/2012 39,959,820 45,603,880 18,930 75,157,024 3,970 22,355 80,801,080 3,614 -5,644,060
12/10/2012 52,561,200 28,829,900 21,719 90,858,152 4,183 18,809 67,126,848 3,569 23,731,300
12/7/2012 41,999,408 36,886,180 17,095 68,108,912 3,984 18,034 62,995,680 3,493 5,113,230
12/6/2012 38,079,072 39,368,620 16,543 64,863,528 3,921 18,890 66,153,080 3,502 -1,289,550
12/5/2012 44,896,792 31,324,770 19,924 80,736,528 4,052 20,771 67,164,512 3,234 13,572,020
12/4/2012 35,262,200 28,613,790 16,640 58,977,580 3,544 16,424 52,329,168 3,186 6,648,410
12/3/2012 23,004,980 25,087,240 12,981 40,184,420 3,096 12,862 42,266,680 3,286 -2,082,260
11/30/2012 23,026,510 32,171,560 12,887 39,552,192 3,069 14,716 48,697,240 3,309 -9,145,050
11/29/2012 27,971,860 25,780,160 13,810 42,717,408 3,093 13,060 40,525,712 3,103 2,191,700
11/28/2012 25,453,620 26,447,430 13,729 41,662,480 3,035 13,124 42,656,288 3,250 -993,810
11/27/2012 27,831,380 24,866,920 13,872 41,931,380 3,023 12,578 38,966,920 3,098 2,964,460
11/26/2012 23,906,970 31,271,120 14,031 43,331,040 3,088 14,818 50,695,192 3,421 -7,364,150
11/23/2012 28,963,520 33,563,540 15,199 47,552,060 3,129 16,456 52,152,080 3,169 -4,600,020