Largest Nasdaq Short Interest Changes as of Dec. 31

The following are the 50 largest short interest changes on the Nasdaq Stock Market as of the Dec. 31 settlement date. The table ranks the top 50 positive changes followed by the top negative changes.

TOP 50 INCREASES


Ticker                                                                   
Symbol   Company                    Dec. 31        Dec. 15         Change    
=============================================================================
CMCSA    COMCAST CORP-A            59,852,021     53,173,533      6,678,488
QQQQ     POWERSH-QQQ               77,109,295     70,802,783      6,306,512
AVGO     AVAGO TECHNOLOGI           8,499,063      4,298,137      4,200,926
XLNX     XILINX INC                30,723,091     27,346,485      3,376,606
VRSN     VERISIGN INC              12,224,273      9,508,234      2,716,039
DRYS     DRYSHIPS INC              21,611,301     18,928,213      2,683,088
VOD      VODAFONE GRP-ADR           7,460,156      4,954,768      2,505,388
JASO     JA SOLAR HOL-ADR          26,713,317     24,223,482      2,489,835
MYL      MYLAN INC                 29,940,590     27,512,159      2,428,431
MNKD     MANNKIND CORP             21,476,543     19,195,611      2,280,932
BCON     BEACON POWER               4,220,629      1,981,188      2,239,441
OXPS     OPTIONSXPRESS HO           6,167,890      3,949,193      2,218,697
NTSP     NETSPEND HOLDING           3,069,902        978,723      2,091,179
ENTR     ENTROPIC COMMUNI          22,034,983     19,997,124      2,037,859
DVAX     DYNAVAX TECHNOLO           4,028,875      2,048,355      1,980,520
AVNR     AVANIR PHARM INC          15,226,002     13,423,343      1,802,659
ERTS     ELECTRONIC ARTS           18,752,155     17,181,076      1,571,079
DELL     DELL INC                  57,536,890     56,033,782      1,503,108
TIBX     TIBCO SOFTWARE             7,128,485      5,667,258      1,461,227
SQNM     SEQUENOM INC              17,943,624     16,648,978      1,294,646
VPRT     VISTAPRINT NV              6,979,361      5,742,284      1,237,077
HBAN     HUNTINGTON BANC           35,071,824     33,838,827      1,232,997
ROVI     ROVI CORP                  7,789,829      6,567,573      1,222,256
ULTA     ULTA SALON COSME           4,088,784      2,933,690      1,155,094
ROSE     ROSETTA RESOURCE           3,892,426      2,740,114      1,152,312
AMLN     AMYLIN PHARM INC          13,355,663     12,240,774      1,114,889
CHTP     CHELSEA THERAPEU           4,147,589      3,037,084      1,110,505
SOMX     SOMAXON PHARMACE          11,847,358     10,753,616      1,093,742
AGNC     AMERICAN CAPITAL           3,504,454      2,445,435      1,059,019
CTRP     CTRIP.COM-ADR              8,407,604      7,358,634      1,048,970
RNOW     RIGHTNOW TECH              3,182,150      2,141,797      1,040,353
XOMA     XOMA LTD                   1,169,119        197,124        971,995
AMGN     AMGEN INC                 15,291,984     14,336,938        955,046
XXIA     IXIA                       3,141,055      2,204,286        936,769
ZAGG     ZAGG INC                   4,111,925      3,199,300        912,625
ASBC     ASSOC BANC-CORP           13,381,548     12,512,523        869,025
AAXJ     ISHAR ASIA EX-JP           2,797,825      1,940,321        857,504
MGIC     MAGIC SOFTWARE             1,216,188        374,109        842,079
PMCS     PMC-SIERRA INC             6,482,938      5,646,207        836,731
CNQR     CONCUR TECH INC            7,275,729      6,456,386        819,343
CORT     CORCEPT THERA              2,483,278      1,688,922        794,356
PDLI     PDL BIOPHARMA IN          11,500,987     10,723,863        777,124
RPRX     REPROS THERAPEUT           1,003,956        241,804        762,152
HMIN     HOME INNS & -ADR           2,167,553      1,412,534        755,019
URRE     URANIUM RES INC            2,079,035      1,330,457        748,578
ENZN     ENZON PHARMACEUT           6,519,470      5,771,729        747,741
PWER     POWER-ONE INC             38,992,076     38,246,696        745,380
SLXP     SALIX PHARM                6,817,550      6,073,287        744,263
MSFT     MICROSOFT CORP            85,210,953     84,467,252        743,701
ARIA     ARIAD PHARM               10,629,641      9,904,955        724,686

TOP 50 DECREASES


Ticker                                                                   
Symbol   Company                    Dec. 31        Dec. 15         Change    
=============================================================================
LVLT     LEVEL 3 COMM INC         131,913,166    147,372,915    -15,459,749
SIRI     SIRIUS XM RADIO          213,077,965    225,721,127    -12,643,162
PWAV     POWERWAVE TECH             7,374,383     18,736,932    -11,362,549
BPOP     POPULAR INC                7,927,347     19,091,365    -11,164,018
INTC     INTEL CORP                48,402,022     58,461,708    -10,059,686
NWSA     NEWS CORP-A               29,635,183     37,043,124     -7,407,941
SNIC     SONIC SOLUTIONS            6,573,082     13,741,667     -7,168,585
DTV      DIRECTV-A                 12,412,328     18,833,643     -6,421,315
ALTR     ALTERA CORP               21,323,370     27,397,755     -6,074,385
NVDA     NVIDIA CORP               26,634,255     32,650,279     -6,016,024
MRVL     MARVELL TECH GRP          11,253,799     16,436,765     -5,182,966
MAT      MATTEL INC                 6,488,142     11,474,645     -4,986,503
ATVI     ACTIVISION BLIZZ          26,528,333     31,356,014     -4,827,681
MATK     MARTEK BIOSCIENC           2,973,591      7,703,796     -4,730,205
FLEX     FLEXTRONICS INTL          13,063,462     17,615,517     -4,552,055
SYMC     SYMANTEC CORP             15,917,442     20,139,877     -4,222,435
AONE     A123 SYSTEMS INC          11,520,911     15,541,611     -4,020,700
ADBE     ADOBE SYS INC              9,648,785     13,313,331     -3,664,546
EBAY     EBAY INC                  22,061,260     25,499,310     -3,438,050
ARNA     ARENA PHARMACEUT          30,362,019     33,744,622     -3,382,603
QCOM     QUALCOMM INC              22,867,461     25,808,719     -2,941,258
ACAS     AMERICAN CAPITAL          14,182,599     16,990,089     -2,807,490
BIIB     BIOGEN IDEC INC            8,753,854     11,528,017     -2,774,163
SFSF     SUCCESSFACTORS I           8,436,466     11,204,393     -2,767,927
CRBC     CITIZENS REPUBLI           8,363,502     11,085,885     -2,722,383
GILD     GILEAD SCIENCES           16,108,988     18,793,030     -2,684,042
ESRX     EXPRESS SCRIPT             8,219,449     10,884,837     -2,665,388
SANM     SANMINA-SCI CORP           3,986,501      6,598,113     -2,611,612
ORCL     ORACLE CORP               30,283,207     32,867,893     -2,584,686
BRCM     BROADCOM CORP-A            5,786,878      8,341,312     -2,554,434
RFMD     RF MICRO DEVICES          15,727,580     18,278,767     -2,551,187
SBUX     STARBUCKS CORP            10,394,284     12,922,139     -2,527,855
TQNT     TRIQUINT SEMICON           6,213,645      8,654,946     -2,441,301
PCAR     PACCAR INC                11,842,933     14,245,831     -2,402,898
CTAS     CINTAS CORP                4,536,858      6,907,580     -2,370,722
WTNY     WHITNEY HLDG               7,764,581     10,065,608     -2,301,027
TLAB     TELLABS INC               14,778,208     17,031,750     -2,253,542
MXIM     MAXIM INTEGRATED          11,420,027     13,646,896     -2,226,869
HCBK     HUDSON CITY BNCP          11,372,533     13,563,720     -2,191,187
GMCR     GREEN MOUNTAIN            26,411,224     28,552,090     -2,140,866
BBBY     BED BATH &BEYOND           5,145,499      7,255,463     -2,109,964
WIN      WINDSTREAM CORP           16,146,509     18,233,548     -2,087,039
RIMM     RESEARCH IN MOTI          26,405,434     28,458,870     -2,053,436
MCHP     MICROCHIP TECH            15,938,296     17,919,999     -1,981,703
CATY     CATHAY GENERAL B           5,139,673      7,086,027     -1,946,354
ATML     ATMEL CORP                10,037,312     11,890,135     -1,852,823
JBLU     JETBLUE AIRWAYS           40,783,497     42,619,163     -1,835,666
HIBB     HIBBETT SPORTS I           3,121,241      4,942,307     -1,821,066
LINTA    LIBERTY-INTER A            5,689,422      7,502,826     -1,813,404
VVUS     VIVUS INC                 12,371,336     14,177,909     -1,806,573

*-- Data includes ETF positions.

-- Bloomberg News To contact Bloomberg News for this story: +1-212-318-2000 or newsdev@bloomberg.net

-0- Jan/11/2011 23:21 GMT

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