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Largest Nasdaq Short Interest Changes as of April 15

The following are the 50 largest short interest changes on the Nasdaq Stock Market as of the April 15 settlement date. The table ranks the top 50 positive changes followed by the top negative changes.

TOP 50 INCREASES


Ticker                                                                   
Symbol   Company                    April 15       March 31        Change    
=============================================================================
LVLT     LEVEL 3 COMM INC         155,846,326     89,379,553     66,466,773
INTC     INTEL CORP                71,546,703     56,695,649     14,851,054
ADBE     ADOBE SYS INC             23,579,924     16,149,547      7,430,377
NVDA     NVIDIA CORP               29,882,742     23,106,598      6,776,144
STX      SEAGATE TECHNOLO          17,863,193     12,387,573      5,475,620
WCRX     WARNER CHILCOT-A           8,260,703      3,061,491      5,199,212
SIRI     SIRIUS XM RADIO          270,264,848    265,453,444      4,811,404
VVUS     VIVUS INC                 21,186,305     16,610,622      4,575,683
EXEL     EXELIXIS INC              15,125,954     10,553,207      4,572,747
DRYS     DRYSHIPS INC              17,094,692     12,902,712      4,191,980
SPLS     STAPLES INC               19,403,826     15,219,434      4,184,392
AMAT     APPLIED MATERIAL          26,353,161     22,289,591      4,063,570
AMSC     AMER SUPERCONDTR          12,706,323      8,984,253      3,722,070
CLWR     CLEARWIRE -CL A           51,527,542     48,152,320      3,375,222
FLEX     FLEXTRONICS INTL          17,876,355     14,607,097      3,269,258
ORCL     ORACLE CORP               24,838,895     21,745,247      3,093,648
NDAQ     NASDAQ OMX GROUP           6,346,628      3,319,528      3,027,100
CPST     CAPSTONE TURBINE          35,613,115     32,667,904      2,945,211
DELL     DELL INC                  64,048,316     61,173,168      2,875,148
AVNR     AVANIR PHARM INC          32,797,704     30,028,579      2,769,125
COST     COSTCO WHOLESALE           8,946,182      6,215,937      2,730,245
ATML     ATMEL CORP                12,310,205      9,804,059      2,506,146
URBN     URBAN OUTFITTER           12,628,506     10,153,569      2,474,937
INTU     INTUIT INC                 6,574,030      4,116,421      2,457,609
DNDN     DENDREON CORP             17,148,479     14,794,357      2,354,122
OCZ      OCZ TECHNOLOGY             5,575,556      3,357,858      2,217,698
MCHP     MICROCHIP TECH            15,891,535     13,755,132      2,136,403
SVNT     SAVIENT PHARMACE          16,487,632     14,384,423      2,103,209
CSCO     CISCO SYSTEMS             56,671,161     54,572,759      2,098,402
AONE     A123 SYSTEMS INC          15,644,719     13,614,200      2,030,519
JASO     JA SOLAR HOL-ADR          28,911,496     26,891,494      2,020,002
FNFG     FIRST NIAGARA FI          26,748,746     24,749,703      1,999,043
FNSR     FINISAR CORP              10,984,060      9,003,262      1,980,798
CTXS     CITRIX SYSTEMS             6,941,725      5,072,427      1,869,298
WBMD     WEBMD HEALTH COR           4,943,212      3,089,074      1,854,138
SNDK     SANDISK CORP               9,092,696      7,280,719      1,811,977
SPWRA    SUNPOWER CORP-A           18,002,416     16,201,280      1,801,136
RRD      RR DONNELLEY & S           9,054,067      7,256,798      1,797,269
PAYX     PAYCHEX INC                7,309,290      5,517,198      1,792,092
CIGX     STAR SCIENTIFIC           16,327,446     14,574,605      1,752,841
STEC     STEC INC                  13,103,499     11,418,492      1,685,007
SPIL     SILICONWARE-ADR            6,241,570      4,563,690      1,677,880
ACAS     AMERICAN CAPITAL          15,595,258     13,921,588      1,673,670
URRE     URANIUM RES INC            6,618,064      4,971,327      1,646,737
NTAP     NETAPP INC                18,902,091     17,273,994      1,628,097
QQQ      POWERSH-QQQ               92,711,713     91,123,690      1,588,023
MPEL     MELCO CROWN-ADR            9,661,184      8,074,829      1,586,355
HNSN     HANSEN MEDICAL I           5,015,597      3,435,044      1,580,553
CREE     CREE INC                  23,995,816     22,457,716      1,538,100
FSIN     FUSHI COPPERWELD           5,461,412      3,924,025      1,537,387

TOP 50 DECREASES


Ticker                                                                   
Symbol   Company                    April 15       March 31        Change    
=============================================================================
MSFT     MICROSOFT CORP            71,905,713     82,774,442    -10,868,729
LOGI     LOGITECH INTER-R          24,232,304     31,147,003     -6,914,699
WIN      WINDSTREAM CORP           14,518,725     20,780,684     -6,261,959
MU       MICRON TECH               43,722,466     48,366,953     -4,644,487
ARNA     ARENA PHARMACEUT          28,107,722     32,523,407     -4,415,685
YHOO     YAHOO! INC                46,385,931     50,725,452     -4,339,521
VRSN     VERISIGN INC               5,844,627      8,800,238     -2,955,611
ERIC     ERICSSON LM-ADR           16,794,178     19,731,216     -2,937,038
CEPH     CEPHALON INC              12,434,546     15,317,807     -2,883,261
QCOR     QUESTCOR PHARM             8,245,516     10,931,395     -2,685,879
AXAS     ABRAXAS PETRO              8,944,496     11,417,441     -2,472,945
PSEC     PROSPECT CAPITAL           8,093,023     10,293,199     -2,200,176
LINTA    LIBERTY-INTER A            3,990,556      6,051,914     -2,061,358
TWTC     TW TELECOM INC             5,325,497      7,345,942     -2,020,445
CBEH     CHINA INTEGRATED           3,556,941      5,473,862     -1,916,921
ABAT     ADVANCED BATTERY           7,850,260      9,689,721     -1,839,461
NUAN     NUANCE COMMUNICA          16,268,575     18,077,676     -1,809,101
CMCSA    COMCAST CORP-A            38,710,264     40,517,938     -1,807,674
BPOP     POPULAR INC               11,987,423     13,761,142     -1,773,719
ATVI     ACTIVISION BLIZZ          15,838,882     17,525,985     -1,687,103
LOGM     LOGMEIN INC                3,044,387      4,706,729     -1,662,342
DISCA    DISCOVERY COMM-A          11,218,673     12,847,444     -1,628,771
FAST     FASTENAL CO               10,985,350     12,610,756     -1,625,406
SWKS     SKYWORKS SOLUTIO           9,247,151     10,824,090     -1,576,939
BWEN     BROADWIND ENERGY           4,058,129      5,569,461     -1,511,332
WTSLA    WET SEAL INC -A           16,869,873     18,354,857     -1,484,984
COCO     CORINTHIAN COLLE          24,744,230     26,171,350     -1,427,120
CVBF     CVB FINANCIAL             14,452,100     15,877,742     -1,425,642
SBUX     STARBUCKS CORP            10,998,323     12,374,944     -1,376,621
PBCT     PEOPLE'S UNITED           20,944,223     22,272,292     -1,328,069
AVII     AVI BIOPHARMA              9,334,268     10,658,313     -1,324,045
ARUN     ARUBA NETWORKS I          10,049,794     11,370,649     -1,320,855
PMCS     PMC-SIERRA INC             4,890,479      6,107,954     -1,217,475
XING     QIAO XING UNIVER           1,388,314      2,604,755     -1,216,441
CPWR     COMPUWARE CORP             2,983,670      4,157,564     -1,173,894
ASNA     ASCENA RETAIL GR           5,482,737      6,652,646     -1,169,909
LXRX     LEXICON PHARMACE          10,224,412     11,389,742     -1,165,330
WFMI     WHOLE FOODS MKT            5,529,931      6,690,656     -1,160,725
ARBA     ARIBA INC                  4,196,646      5,344,958     -1,148,312
CTCT     CONSTANT CONTACT           9,200,686     10,348,192     -1,147,506
HERO     HERCULES OFFSHOR          11,447,009     12,566,650     -1,119,641
TRLG     TRUE RELIGION AP           3,924,478      5,009,041     -1,084,563
ADSK     AUTODESK INC               4,828,592      5,904,391     -1,075,799
BEXP     BRIGHAM EXPLOR             8,234,538      9,298,571     -1,064,033
NVAX     NOVAVAX INC                8,167,699      9,228,927     -1,061,228
ASML     ASML HOLDING-NY            1,402,110      2,417,869     -1,015,759
JDSU     JDS UNIPHASE               5,942,368      6,946,899     -1,004,531
HOLX     HOLOGIC INC                8,220,674      9,218,398       -997,724
ETFC     E*TRADE FINANCIA           3,587,553      4,569,990       -982,437
TIVO     TIVO INC                  16,578,047     17,552,862       -974,815

*-- Data includes ETF positions.

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

-0- May/04/2011 20:30 GMT

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