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. 15         Change    
=============================================================================
SIRI     SIRIUS XM RADIO          401,633,942    379,000,361     22,633,581
VOD      VODAFONE GRP-ADR          10,712,007      3,129,084      7,582,923
GILD     GILEAD SCIENCES           58,802,642     53,031,310      5,771,332
MSFT     MICROSOFT CORP            80,093,007     74,584,075      5,508,932
ORCL     ORACLE CORP               36,594,976     31,703,497      4,891,479
AMAT     APPLIED MATERIAL          16,732,635     11,953,475      4,779,160
INCY     INCYTE CORP               23,306,829     18,768,893      4,537,936
MYL      MYLAN INC                 33,081,134     29,250,274      3,830,860
ETFC     E*TRADE FINANCIA          18,989,961     15,604,732      3,385,229
HAS      HASBRO INC                23,964,006     20,862,562      3,101,444
MNKD     MANNKIND CORP             31,429,971     28,395,246      3,034,725
STRZA    STARZ - LIBERTY            3,991,296        982,461      3,008,835
SYMC     SYMANTEC CORP              9,509,605      6,560,481      2,949,124
PAYX     PAYCHEX INC               20,095,399     17,330,564      2,764,835
FMER     FIRSTMERIT CORP           14,492,610     11,768,606      2,724,004
TXN      TEXAS INSTRUMENT          22,886,574     20,168,164      2,718,410
CLSN     CELSION CORP               9,775,879      7,060,656      2,715,223
PBCT     PEOPLE'S UNITED           16,395,087     13,691,865      2,703,222
AMGN     AMGEN INC                 19,187,030     16,526,509      2,660,521
DNDN     DENDREON CORP             49,812,523     47,244,697      2,567,826
MU       MICRON TECH               56,767,312     54,271,708      2,495,604
ARIA     ARIAD PHARM               10,217,525      7,884,564      2,332,961
NTAP     NETAPP INC                14,429,318     12,158,409      2,270,909
CYBX     CYBERONICS                 2,962,275        829,235      2,133,040
AUXL     AUXILIUM PHARMAC           4,797,440      2,760,354      2,037,086
LULU     LULULEMON ATH             17,755,811     15,730,955      2,024,856
ASBC     ASSOC BANC-CORP            9,938,268      7,989,761      1,948,507
THRX     THERAVANCE                 9,847,131      7,929,497      1,917,634
AKRX     AKORN INC                 12,271,842     10,416,102      1,855,740
LINE     LINN ENERGY LLC            7,300,956      5,460,759      1,840,197
FRAN     FRANCESCAS HOLDI          15,225,323     13,385,914      1,839,409
CROX     CROCS INC                  5,616,200      3,778,011      1,838,189
LSI      LSI CORP                   9,583,481      7,797,058      1,786,423
PSSI     PSS WORLD MEDICA           9,422,694      7,644,316      1,778,378
ARNA     ARENA PHARMACEUT          55,142,745     53,365,578      1,777,167
FITB     FIFTH THIRD BANC          20,552,291     18,799,101      1,753,190
PETM     PETSMART INC               4,907,261      3,168,630      1,738,631
EXXI     ENERGY XXI BERMU           5,774,365      4,179,482      1,594,883
NYMT     NEW YORK MTGE              5,236,403      3,659,152      1,577,251
VMED     VIRGIN MEDIA INC          34,517,111     32,971,828      1,545,283
SSRI     SILVER STANDARD            2,738,347      1,279,860      1,458,487
ERIC     ERICSSON LM-ADR            8,713,451      7,279,587      1,433,864
FMCN     FOCUS MEDIA-ADR            9,158,378      7,772,449      1,385,929
ASML     ASML HOLDING-NY           14,901,152     13,525,716      1,375,436
CRUS     CIRRUS LOGIC INC           7,775,007      6,437,126      1,337,881
CME      CME GROUP INC              9,315,056      7,996,336      1,318,720
RCII     RENT-A-CENTER              7,506,713      6,207,045      1,299,668
SLM      SLM CORP                   4,653,956      3,354,834      1,299,122
SZYM     SOLAZYME INC               8,278,659      7,028,951      1,249,708
MELA     MELA SCIENCES IN           6,567,396      5,335,699      1,231,697

TOP 50 DECREASES


Ticker                                                                   
Symbol   Company                    Jan. 31        Jan. 15         Change    
=============================================================================
DELL     DELL INC                  41,103,772     57,365,649    -16,261,877
INTC     INTEL CORP               196,957,970    205,835,193     -8,877,223
SPLS     STAPLES INC               74,340,023     82,163,696     -7,823,673
YHOO     YAHOO! INC                13,563,880     20,711,092     -7,147,212
CLWR     CLEARWIRE -CL A           11,152,717     17,801,076     -6,648,359
STX      SEAGATE TECHNOLO          36,312,450     41,744,432     -5,431,982
NVDA     NVIDIA CORP               16,669,716     22,089,865     -5,420,149
CMCSK    COMCAST CORP-SPL           6,716,032     11,929,477     -5,213,445
DTV      DIRECTV                   16,416,238     21,583,486     -5,167,248
FB       FACEBOOK INC-A            20,540,598     25,470,575     -4,929,977
LEAP     LEAP WIRELESS             14,964,138     19,317,019     -4,352,881
LIFE     LIFE TECHNOLOGIE           5,074,660      9,151,011     -4,076,351
GMCR     GREEN MOUNTAIN            27,117,800     31,013,405     -3,895,605
ATVI     ACTIVISION BLIZZ          13,287,681     16,559,330     -3,271,649
WDC      WESTERN DIGITAL            6,863,128     10,058,110     -3,194,982
NWSA     NEWS CORP-A               23,515,213     26,604,848     -3,089,635
ADBE     ADOBE SYS INC              9,940,077     13,024,037     -3,083,960
KSWS     K-SWISS INC-A                565,685      3,440,683     -2,874,998
LAMR     LAMAR ADVERTIS-A           2,872,944      5,746,017     -2,873,073
HBAN     HUNTINGTON BANC           16,050,384     18,814,645     -2,764,261
CELG     CELGENE CORP               4,266,030      6,889,254     -2,623,224
GRMN     GARMIN LTD                15,809,709     18,387,688     -2,577,979
ARUN     ARUBA NETWORKS I          18,109,667     20,634,420     -2,524,753
ATML     ATMEL CORP                12,357,011     14,820,815     -2,463,804
CMCSA    COMCAST CORP-A            25,266,351     27,710,020     -2,443,669
ACAS     AMERICAN CAPITAL           3,770,995      5,878,669     -2,107,674
NWS      NEWS CORP-B                4,793,035      6,831,652     -2,038,617
APKT     ACME PACKET INC            5,645,012      7,665,154     -2,020,142
CTXS     CITRIX SYSTEMS             2,570,621      4,503,039     -1,932,418
QCOM     QUALCOMM INC              12,706,716     14,466,075     -1,759,359
IDTI     INTEGRAT DEVICE            7,474,385      9,218,153     -1,743,768
OCZ      OCZ TECHNOLOGY            16,422,353     18,154,998     -1,732,645
CPST     CAPSTONE TURBINE          33,931,054     35,655,560     -1,724,506
SYNA     SYNAPTICS INC              2,321,429      4,005,440     -1,684,011
TIVO     TIVO INC                   8,695,953     10,376,478     -1,680,525
QQQ      POWERSH-QQQ               55,689,635     57,355,469     -1,665,834
QCOR     QUESTCOR PHARM            25,926,715     27,575,999     -1,649,284
TLAB     TELLABS INC               10,799,057     12,413,905     -1,614,848
VRSN     VERISIGN INC              11,953,601     13,562,063     -1,608,462
ZNGA     ZYNGA INC- CL A           13,149,542     14,750,848     -1,601,306
SWHC     SMITH & WESSON H          15,559,299     17,148,471     -1,589,172
NUAN     NUANCE COMMUNICA          12,386,576     13,869,447     -1,482,871
FTR      FRONTIER COMMUNI         212,151,440    213,627,971     -1,476,531
CSCO     CISCO SYSTEMS             56,795,221     58,245,707     -1,450,486
CIEN     CIENA CORP                17,282,863     18,680,889     -1,398,026
THLD     THRESHOLD PHARMA           6,158,114      7,541,916     -1,383,802
OPEN     OPENTABLE INC              5,411,286      6,778,071     -1,366,785
DNKN     DUNKIN' BRANDS G           6,154,304      7,420,514     -1,266,210
ITMN     INTERMUNE INC             13,719,724     14,960,061     -1,240,337
DECK     DECKERS OUTDOOR           13,401,876     14,629,093     -1,227,217

*-- Data includes ETF positions.

-- Bloomberg News

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