Largest Nasdaq Short Interest Changes as of April 29

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

TOP 50 INCREASES


Ticker                                                                   
Symbol   Company                    April 29       April 15        Change    
=============================================================================
INTC     INTEL CORP                82,244,286     71,546,703     10,697,583
HBAN     HUNTINGTON BANC           32,739,459     24,114,444      8,625,015
SIRI     SIRIUS XM RADIO          278,421,342    270,264,848      8,156,494
LVLT     LEVEL 3 COMM INC         161,002,887    155,846,326      5,156,561
ORCL     ORACLE CORP               29,805,558     24,838,895      4,966,663
RIMM     RESEARCH IN MOTI          31,339,538     27,283,545      4,055,993
ATML     ATMEL CORP                16,202,518     12,310,205      3,892,313
URBN     URBAN OUTFITTER           15,855,622     12,628,506      3,227,116
AKAM     AKAMAI TECHNOLOG           8,710,784      5,519,258      3,191,526
OCZ      OCZ TECHNOLOGY             8,653,384      5,575,556      3,077,828
QCOM     QUALCOMM INC              21,990,403     18,932,650      3,057,753
AMTD     TD AMERITRADE HO          15,608,751     12,641,097      2,967,654
CPST     CAPSTONE TURBINE          38,523,750     35,613,115      2,910,635
TLAB     TELLABS INC               18,304,734     15,626,801      2,677,933
SYMC     SYMANTEC CORP              8,916,235      6,288,975      2,627,260
ETFC     E*TRADE FINANCIA           6,160,857      3,587,553      2,573,304
INFY     INFOSYS TECH-ADR           7,332,020      4,776,090      2,555,930
ADBE     ADOBE SYS INC             26,040,236     23,579,924      2,460,312
CMCSA    COMCAST CORP-A            41,054,400     38,710,264      2,344,136
ACOM     ANCESTRY.COM INC           6,444,941      4,245,319      2,199,622
SLGN     SILGAN HOLDINGS            3,393,546      1,299,289      2,094,257
SWSH     SWISHER HYGIENE            7,367,833      5,307,430      2,060,403
TWTC     TW TELECOM INC             7,237,366      5,325,497      1,911,869
VRSN     VERISIGN INC               7,755,239      5,844,627      1,910,612
SPLS     STAPLES INC               21,300,474     19,403,826      1,896,648
ARMH     ARM HOLDINGS-ADR          10,875,337      8,986,545      1,888,792
NTAP     NETAPP INC                20,713,379     18,902,091      1,811,288
AAPL     APPLE INC                 13,349,219     11,546,774      1,802,445
BBBY     BED BATH &BEYOND           6,924,421      5,284,300      1,640,121
SATC     SATCON TECH               23,531,826     21,958,340      1,573,486
AMRN     AMARIN CORP -ADR           4,313,665      2,763,544      1,550,121
HERO     HERCULES OFFSHOR          12,956,385     11,447,009      1,509,376
ASIA     ASIAINFO-LINKAGE           4,831,325      3,397,372      1,433,953
CIGX     STAR SCIENTIFIC           17,750,497     16,327,446      1,423,051
ARUN     ARUBA NETWORKS I          11,467,857     10,049,794      1,418,063
LNCR     LINCARE HOLDINGS           9,749,879      8,464,699      1,285,180
HNSN     HANSEN MEDICAL I           6,279,144      5,015,597      1,263,547
BRKL     BROOKLINE BANCRP           3,756,397      2,503,880      1,252,517
ISIL     INTERSIL CORP-A            9,998,043      8,750,681      1,247,362
INFN     INFINERA CORP              7,017,246      5,789,751      1,227,495
AMGN     AMGEN INC                 14,777,719     13,565,682      1,212,037
HGSI     HUMAN GENOME SCI          19,127,571     17,922,618      1,204,953
AGNC     AMERICAN CAPITAL           7,272,381      6,081,619      1,190,762
CPWR     COMPUWARE CORP             4,097,147      2,983,670      1,113,477
CBST     CUBIST PHARM               7,418,853      6,311,799      1,107,054
ISTA     ISTA PHARMACEUTI           1,552,257        451,986      1,100,271
LOGI     LOGITECH INTER-R          25,313,183     24,232,304      1,080,879
LPSN     LIVEPERSON INC             4,088,900      3,032,084      1,056,816
ELNK     EARTHLINK INC              9,982,093      8,949,792      1,032,301
TIVO     TIVO INC                  17,609,201     16,578,047      1,031,154

TOP 50 DECREASES


Ticker                                                                   
Symbol   Company                    April 29       April 15        Change    
=============================================================================
FNFG     FIRST NIAGARA FI          11,376,006     26,748,746    -15,372,740
ARNA     ARENA PHARMACEUT          13,785,288     28,107,722    -14,322,434
DELL     DELL INC                  53,266,464     64,048,316    -10,781,852
CSCO     CISCO SYSTEMS             48,495,428     56,671,161     -8,175,733
QQQ      POWERSH-QQQ               85,830,106     92,711,713     -6,881,607
MSFT     MICROSOFT CORP            65,654,837     71,905,713     -6,250,876
BPOP     POPULAR INC                5,836,776     11,987,423     -6,150,647
JASO     JA SOLAR HOL-ADR          24,236,922     28,911,496     -4,674,574
EXPE     EXPEDIA INC               20,093,498     24,370,582     -4,277,084
ERIC     ERICSSON LM-ADR           12,577,276     16,794,178     -4,216,902
LBTYA    LIBERTY GLOBAL-A          16,269,633     20,164,212     -3,894,579
BBBB     BLACKBOARD INC             9,659,370     13,306,987     -3,647,617
LBTYK    LIBERTY GLOBAL-C             770,448      4,252,334     -3,481,886
XLNX     XILINX INC                23,169,995     26,148,842     -2,978,847
AMAT     APPLIED MATERIAL          23,608,909     26,353,161     -2,744,252
JBLU     JETBLUE AIRWAYS           45,029,769     47,767,923     -2,738,154
ERTS     ELECTRONIC ARTS           22,856,455     25,416,701     -2,560,246
CCRT     COMPUCREDIT HOLD           3,546,528      5,859,834     -2,313,306
EBAY     EBAY INC                  14,107,708     16,376,536     -2,268,828
SCSS     SELECT COMFORT C           2,000,177      4,229,999     -2,229,822
GMCR     GREEN MOUNTAIN            20,278,617     22,390,234     -2,111,617
GCVRZ    SANOFI CVR                 4,709,777      6,786,657     -2,076,880
BRCD     BROCADE COMM SYS          11,367,121     13,378,971     -2,011,850
VMED     VIRGIN MEDIA INC          24,930,749     26,919,730     -1,988,981
PSEC     PROSPECT CAPITAL           6,147,191      8,093,023     -1,945,832
CIEN     CIENA CORP                24,805,014     26,742,032     -1,937,018
ATVI     ACTIVISION BLIZZ          14,032,229     15,838,882     -1,806,653
MU       MICRON TECH               41,994,828     43,722,466     -1,727,638
LIFE     LIFE TECHNOLOGIE           3,205,523      4,902,927     -1,697,404
SINA     SINA CORP                  4,605,218      6,196,046     -1,590,828
PAAS     PAN AMER SILVER            2,191,035      3,746,596     -1,555,561
PWER     POWER-ONE INC             33,475,105     35,005,426     -1,530,321
CLWR     CLEARWIRE -CL A           50,025,269     51,527,542     -1,502,273
ONNN     ON SEMICONDUCTOR          16,271,985     17,762,127     -1,490,142
FLEX     FLEXTRONICS INTL          16,466,660     17,876,355     -1,409,695
RXII     RXI PHARMACEUTIC           1,711,348      3,070,940     -1,359,592
SPIL     SILICONWARE-ADR            4,905,431      6,241,570     -1,336,139
CBEY     CBEYOND INC                3,060,828      4,395,040     -1,334,212
INTU     INTUIT INC                 5,389,259      6,574,030     -1,184,771
PPDI     PHARM PROD DEVEL           4,125,080      5,306,371     -1,181,291
TEVA     TEVA PHARM-ADR             6,451,112      7,577,522     -1,126,410
PARD     PONIARD PHARMACE           2,630,203      3,752,243     -1,122,040
DNDN     DENDREON CORP             16,038,283     17,148,479     -1,110,196
CEPH     CEPHALON INC              11,339,257     12,434,546     -1,095,289
FMER     FIRSTMERIT CORP            4,754,847      5,845,039     -1,090,192
VVUS     VIVUS INC                 20,112,276     21,186,305     -1,074,029
JRCC     JAMES RIVER COAL           7,882,959      8,948,457     -1,065,498
ATPG     ATP OIL & GAS             17,629,219     18,692,168     -1,062,949
DTV      DIRECTV-A                 12,467,800     13,516,781     -1,048,981
LEAP     LEAP WIRELESS              7,786,316      8,817,837     -1,031,521

*-- Data includes ETF positions.

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

-0- May/11/2011 15:46 GMT

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