Largest Nasdaq Short Interest Changes as of Jan. 31

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

TOP 50 INCREASES


Ticker                                                                   
Symbol   Company                    Jan. 31        Jan. 14         Change    
=============================================================================
SIRI     SIRIUS XM RADIO          252,054,375    239,986,902     12,067,473
PBCT     PEOPLE'S UNITED           24,880,679     18,628,263      6,252,416
AVGO     AVAGO TECHNOLOGI           7,657,191      1,488,680      6,168,511
INTC     INTEL CORP                53,672,906     48,163,102      5,509,804
QCOM     QUALCOMM INC              30,215,168     25,171,148      5,044,020
TLAB     TELLABS INC               17,616,898     13,169,846      4,447,052
YHOO     YAHOO! INC                62,659,440     59,129,389      3,530,051
AAPL     APPLE INC                 10,025,619      6,664,008      3,361,611
BCON     BEACON POWER               7,587,698      4,255,813      3,331,885
JBLU     JETBLUE AIRWAYS           45,060,404     41,817,366      3,243,038
NWSA     NEWS CORP-A               31,418,633     28,237,264      3,181,369
CPST     CAPSTONE TURBINE          29,187,662     26,143,093      3,044,569
DNDN     DENDREON CORP             15,599,259     12,963,904      2,635,355
ARCC     ARES CAPITAL COR           3,712,600      1,103,500      2,609,100
GILD     GILEAD SCIENCES           17,851,963     15,289,453      2,562,510
BPAX     BIOSANTE PHARMA            6,465,886      4,062,570      2,403,316
AMAT     APPLIED MATERIAL          21,980,701     19,578,296      2,402,405
CLDA     CLINICAL DATA IN           5,697,278      3,317,373      2,379,905
RRD      RR DONNELLEY & S          10,018,360      7,647,373      2,370,987
ERIC     ERICSSON LM-ADR           22,220,541     19,855,281      2,365,260
CLWR     CLEARWIRE -CL A           34,033,451     31,784,080      2,249,371
BBBY     BED BATH &BEYOND           7,626,488      5,425,137      2,201,351
ADBE     ADOBE SYS INC             14,017,821     12,007,009      2,010,812
EGLE     EAGLE BULK SHIPP           5,167,655      3,168,381      1,999,274
CEPH     CEPHALON INC              13,482,801     11,662,745      1,820,056
CMCSA    COMCAST CORP-A            49,544,774     47,739,317      1,805,457
IVAN     IVANHOE ENERGY             5,327,002      3,542,169      1,784,833
ENER     ENERGY CONV DEV           12,187,459     10,414,042      1,773,417
VVUS     VIVUS INC                 13,507,895     11,737,576      1,770,319
SBUX     STARBUCKS CORP            11,944,336     10,179,072      1,765,264
DEPO     DEPOMED INC                4,686,545      2,954,911      1,731,634
MPEL     MELCO CROWN-ADR            7,979,764      6,270,251      1,709,513
PAYX     PAYCHEX INC               14,764,364     13,109,801      1,654,563
INFN     INFINERA CORP              5,924,505      4,316,841      1,607,664
SYNA     SYNAPTICS INC              9,644,341      8,046,699      1,597,642
PLUG     PLUG POWER INC             2,461,110        954,784      1,506,326
ERTS     ELECTRONIC ARTS           22,509,124     21,003,444      1,505,680
VOD      VODAFONE GRP-ADR          12,478,224     10,975,208      1,503,016
SPIL     SILICONWARE-ADR            5,440,993      3,957,881      1,483,112
AVNR     AVANIR PHARM INC          18,157,951     16,729,493      1,428,458
LLEN     L&L ENERGY INC             4,775,254      3,438,666      1,336,588
CA       CA INC                     6,168,864      4,879,544      1,289,320
SGMO     SANGAMO BIOSCIEN           5,977,227      4,717,285      1,259,942
VRTX     VERTEX PHARM              13,146,028     11,910,030      1,235,998
URRE     URANIUM RES INC            4,499,777      3,269,606      1,230,171
RXII     RXI PHARMACEUTIC           2,487,130      1,265,919      1,221,211
AXAS     ABRAXAS PETRO              6,447,542      5,231,903      1,215,639
CAKE     CHEESECAKE FACTO           8,762,453      7,560,913      1,201,540
ASNA     ASCENA RETAIL GR           7,490,745      6,363,223      1,127,522
RFMD     RF MICRO DEVICES          18,366,615     17,251,243      1,115,372

TOP 50 DECREASES


Ticker                                                                   
Symbol   Company                    Jan. 31        Jan. 14         Change    
=============================================================================
LVLT     LEVEL 3 COMM INC          87,448,215    114,860,220    -27,412,005
NVDA     NVIDIA CORP               24,419,222     37,554,933    -13,135,711
CTIC     CELL THERAPEUTIC          50,845,829     57,793,968     -6,948,139
CIEN     CIENA CORP                24,114,137     30,248,377     -6,134,240
MSFT     MICROSOFT CORP            76,262,571     80,627,411     -4,364,840
CSCO     CISCO SYSTEMS             39,156,157     43,305,378     -4,149,221
CMCSK    COMCAST CORP-SPL          13,945,828     17,834,719     -3,888,891
RIMM     RESEARCH IN MOTI          25,091,926     28,670,528     -3,578,602
FITB     FIFTH THIRD BANC          21,218,366     24,656,437     -3,438,071
DELL     DELL INC                  56,550,189     59,977,366     -3,427,177
VRSN     VERISIGN INC               8,196,142     11,471,692     -3,275,550
CPRT     COPART INC                 6,079,543      9,233,643     -3,154,100
ALTR     ALTERA CORP               17,216,345     20,211,576     -2,995,231
PWER     POWER-ONE INC             38,269,014     41,183,705     -2,914,691
SIMO     SILICON MOTI-ADR              41,082      2,928,765     -2,887,683
ATHR     ATHEROS COMMUNIC           1,704,979      4,571,906     -2,866,927
IDTI     INTEGRAT DEVICE            9,964,633     12,807,269     -2,842,636
SNDK     SANDISK CORP               7,586,792     10,113,357     -2,526,565
MRVL     MARVELL TECH GRP           7,219,887      9,727,229     -2,507,342
HGSI     HUMAN GENOME SCI          12,476,730     14,963,271     -2,486,541
PTEN     PATTERSON-UTI             14,614,592     17,068,606     -2,454,014
OXPS     OPTIONSXPRESS HO           2,791,816      5,170,869     -2,379,053
ADTN     ADTRAN INC                 7,269,456      9,505,198     -2,235,742
BRCD     BROCADE COMM SYS          12,798,501     14,990,432     -2,191,931
BIDU     BAIDU INC-SP ADR           6,703,104      8,889,621     -2,186,517
DRYS     DRYSHIPS INC              20,868,340     23,042,880     -2,174,540
ATPG     ATP OIL & GAS             15,699,305     17,871,416     -2,172,111
ORCL     ORACLE CORP               25,030,012     27,201,620     -2,171,608
SYMC     SYMANTEC CORP             12,365,722     14,515,518     -2,149,796
UTSI     UTSTARCOM INC              4,247,711      6,364,799     -2,117,088
SWKS     SKYWORKS SOLUTIO          12,227,346     14,335,363     -2,108,017
MXIM     MAXIM INTEGRATED           8,593,102     10,676,039     -2,082,937
FAST     FASTENAL CO               13,079,450     15,066,802     -1,987,352
AMZN     AMAZON.COM INC             6,672,119      8,657,467     -1,985,348
VMED     VIRGIN MEDIA INC          24,969,415     26,873,696     -1,904,281
APOL     APOLLO GROUP-A             6,730,311      8,615,336     -1,885,025
NDAQ     NASDAQ OMX GROUP           5,968,234      7,832,540     -1,864,306
MNKD     MANNKIND CORP             19,877,272     21,719,455     -1,842,183
CY       CYPRESS SEMICON            6,870,380      8,687,764     -1,817,384
EBAY     EBAY INC                  18,606,833     20,342,554     -1,735,721
INCY     INCYTE CORP               13,857,184     15,514,282     -1,657,098
JDSU     JDS UNIPHASE               5,947,955      7,580,962     -1,633,007
AMRN     AMARIN CORP -ADR           3,661,039      5,262,799     -1,601,760
CHRW     CH ROBINSON               10,844,531     12,414,443     -1,569,912
FNSR     FINISAR CORP               7,541,028      9,109,721     -1,568,693
ISIL     INTERSIL CORP-A           14,800,703     16,304,262     -1,503,559
PLCM     POLYCOM INC                3,229,618      4,705,322     -1,475,704
WTNY     WHITNEY HLDG               5,277,390      6,722,989     -1,445,599
AMGN     AMGEN INC                 13,560,703     14,958,849     -1,398,146
TQNT     TRIQUINT SEMICON           8,333,825      9,686,346     -1,352,521

*-- Data includes ETF positions.

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

-0- Feb/09/2011 23:59 GMT

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