The following are the 50 largest short interest changes on the Nasdaq Stock Market as of the Feb. 29 settlement date. The table ranks the top 50 positive changes followed by the top negative changes.

TOP 50 INCREASES


Ticker                                                                   
Symbol   Company                    Feb. 29        Feb. 15         Change    
=============================================================================
SIRI     SIRIUS XM RADIO          285,847,828    273,099,537     12,748,291
FTR      FRONTIER COMMUNI         173,941,139    165,731,165      8,209,974
MSFT     MICROSOFT CORP            61,489,992     55,428,243      6,061,749
WIN      WINDSTREAM CORP           37,272,952     31,388,574      5,884,378
QQQ      POWERSH-QQQ               78,523,067     73,497,691      5,025,376
FSLR     FIRST SOLAR INC           18,602,299     13,685,921      4,916,378
ATML     ATMEL CORP                18,392,869     14,412,276      3,980,593
ATVI     ACTIVISION BLIZZ          25,104,682     21,390,623      3,714,059
EA       ELECTRONIC ARTS           20,853,208     17,401,393      3,451,815
EBAY     EBAY INC                  13,684,277     10,269,312      3,414,965
RIMM     RESEARCH IN MOTI          59,214,549     55,904,812      3,309,737
MNKD     MANNKIND CORP             17,807,397     14,606,250      3,201,147
QLGC     QLOGIC CORP                4,592,353      1,742,599      2,849,754
CLWR     CLEARWIRE -CL A           35,614,379     32,834,437      2,779,942
AMZN     AMAZON.COM INC            10,872,350      8,592,084      2,280,266
AKRX     AKORN INC                  7,997,951      5,766,121      2,231,830
OREX     OREXIGEN THERAPE           5,463,585      3,235,390      2,228,195
ARNA     ARENA PHARMACEUT          25,332,031     23,163,201      2,168,830
BPOP     POPULAR INC               15,867,882     13,721,890      2,145,992
CHTP     CHELSEA THERAPEU           6,951,076      4,819,259      2,131,817
HGSI     HUMAN GENOME SCI          38,299,322     36,223,385      2,075,937
EXEL     EXELIXIS INC              18,016,081     15,996,442      2,019,639
AGNC     AMERICAN CAPITAL          10,923,842      8,931,373      1,992,469
GNOM     COMPLETE GENOMIC           3,533,518      1,570,811      1,962,707
QCOM     QUALCOMM INC              15,880,341     14,017,464      1,862,877
GTAT     GT ADVANCED TECH          18,080,118     16,357,913      1,722,205
AONE     A123 SYSTEMS INC          23,356,444     21,653,575      1,702,869
ACAS     AMERICAN CAPITAL           3,613,810      1,912,088      1,701,722
CTRP     CTRIP.COM-ADR             10,868,884      9,172,262      1,696,622
NIHD     NII HOLDING INC            8,423,234      6,726,843      1,696,391
PMTC     PARAMETRIC TECH            5,062,888      3,396,654      1,666,234
YHOO     YAHOO! INC                27,996,626     26,366,458      1,630,168
SPLS     STAPLES INC               29,957,584     28,338,592      1,618,992
DRYS     DRYSHIPS INC              12,017,050     10,420,753      1,596,297
VMED     VIRGIN MEDIA INC          32,770,149     31,179,259      1,590,890
PAAS     PAN AMER SILVER            7,378,766      5,787,984      1,590,782
IRWD     IRONWOOD PHARMAC           7,397,288      5,947,599      1,449,689
EGLE     EAGLE BULK SHIPP           9,153,003      7,735,395      1,417,608
CHRW     CH ROBINSON                7,552,929      6,160,314      1,392,615
PACB     PACIFIC BIOSCIEN           4,547,155      3,174,960      1,372,195
PAYX     PAYCHEX INC                9,029,011      7,716,674      1,312,337
IDIX     IDENIX PHARM              10,072,840      8,829,013      1,243,827
MNST     MONSTER BEVERAGE           2,949,139      1,713,060      1,236,079
EXTR     EXTREME NETWORKS           3,765,214      2,557,826      1,207,388
LIFE     LIFE TECHNOLOGIE           5,586,997      4,391,100      1,195,897
PDLI     PDL BIOPHARMA IN          16,399,853     15,230,745      1,169,108
MU       MICRON TECH               52,057,565     50,921,383      1,136,182
KITD     KIT DIGITAL INC           21,125,723     20,060,726      1,064,997
JASO     JA SOLAR HOL-ADR          13,654,116     12,592,339      1,061,777
XLNX     XILINX INC                12,621,068     11,569,982      1,051,086

TOP 50 DECREASES


Ticker                                                                   
Symbol   Company                    Feb. 29        Feb. 15         Change    
=============================================================================
MVIS     MICROVISION INC            1,572,273     12,331,059    -10,758,786
DELL     DELL INC                  63,173,306     69,517,855     -6,344,549
EMKR     EMCORE CORP                1,616,682      5,604,181     -3,987,499
INTC     INTEL CORP                99,542,746    103,422,076     -3,879,330
SUSQ     SUSQUEHAN BNCSHS           9,127,005     12,422,367     -3,295,362
HBAN     HUNTINGTON BANC            9,618,972     12,828,103     -3,209,131
AKAM     AKAMAI TECHNOLOG           4,859,351      7,702,224     -2,842,873
ACIW     ACI WORLDWIDE IN           1,547,509      4,242,001     -2,694,492
GILD     GILEAD SCIENCES           10,796,842     13,470,113     -2,673,271
GRMN     GARMIN LTD                11,080,129     13,654,946     -2,574,817
ALXA     ALEXZA PHARMACEU             556,281      2,632,801     -2,076,520
ARIA     ARIAD PHARM               12,633,152     14,690,048     -2,056,896
TQNT     TRIQUINT SEMICON          12,081,139     14,028,372     -1,947,233
RFMD     RF MICRO DEVICES          22,918,952     24,857,770     -1,938,818
COCO     CORINTHIAN COLLE          15,382,537     17,244,981     -1,862,444
MCHP     MICROCHIP TECH            18,103,548     19,963,304     -1,859,756
JBLU     JETBLUE AIRWAYS           35,854,542     37,706,207     -1,851,665
TXN      TEXAS INSTRUMENT          15,729,390     17,455,272     -1,725,882
ONNN     ON SEMICONDUCTOR          12,655,048     14,370,871     -1,715,823
CSTR     COINSTAR INC               8,403,059     10,105,198     -1,702,139
ZNGA     ZYNGA INC- CL A           25,917,765     27,607,369     -1,689,604
AMAT     APPLIED MATERIAL          18,062,920     19,751,895     -1,688,975
PCAR     PACCAR INC                 8,674,907     10,337,884     -1,662,977
FSIN     FUSHI COPPERWELD           5,249,801      6,911,988     -1,662,187
REGN     REGENERON PHARM            5,155,322      6,663,475     -1,508,153
BRCM     BROADCOM CORP-A            7,947,256      9,448,659     -1,501,403
OVTI     OMNIVISION TECH            4,309,038      5,773,763     -1,464,725
PTEN     PATTERSON-UTI              6,325,369      7,752,163     -1,426,794
ARRY     ARRAY BIOPHARMA            2,453,676      3,824,242     -1,370,566
MYL      MYLAN INC                 29,274,797     30,630,467     -1,355,670
TROW     T ROWE PRICE GRP           5,001,811      6,355,796     -1,353,985
GMCR     GREEN MOUNTAIN            21,157,035     22,495,957     -1,338,922
CORT     CORCEPT THERA              3,353,509      4,619,054     -1,265,545
FINL     FINISH LINE-A              4,134,366      5,388,944     -1,254,578
MDCA     MDC PARTNERS-A               918,860      2,110,222     -1,191,362
MPEL     MELCO CROWN-ADR            6,512,971      7,672,459     -1,159,488
ASNA     ASCENA RETAIL GR           5,083,467      6,217,922     -1,134,455
LLTC     LINEAR TECH CORP           8,576,999      9,673,154     -1,096,155
LLNW     LIMELIGHT NETWOR           7,564,889      8,593,488     -1,028,599
STLD     STEEL DYNAMICS             5,184,331      6,192,147     -1,007,816
BMC      BMC SOFTWARE INC           2,953,347      3,959,766     -1,006,419
SONO     SONOSITE INC                 119,165      1,106,668       -987,503
INTU     INTUIT INC                 4,918,795      5,894,996       -976,201
FOSL     FOSSIL INC                 4,818,891      5,789,008       -970,117
DWA      DREAMWORKS ANI-A          18,280,915     19,211,880       -930,965
MRVL     MARVELL TECH GRP           4,743,248      5,663,507       -920,259
VIAB     VIACOM INC-B               7,473,441      8,354,989       -881,548
HCBK     HUDSON CITY BNCP          14,558,482     15,389,352       -830,870
WFM      WHOLE FOODS MKT            8,214,302      9,022,211       -807,909
NWS      NEWS CORP-B                3,029,869      3,830,860       -800,991

*-- Data includes ETF positions.

-- Bloomberg News

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