Short Interest Volume Changes: MAJOR BIOTECH (AMGN, GILD, BIIB, CELG, GENZ)
We ran a screen of the top five NASDAQ biotech stocks by market cap to look at the short interest changes from the end of May to mid-June. Amgen Inc. (NASDAQ: AMGN) had the largest gains in short selling by far and the others were mixed. We also screened Gilead Sciences Inc. (NASDAQ: GILD), Biogen Idec Inc. (NASDAQ: BIIB), Celgene Corporation (NASDAQ: CELG), and Genzyme Corp. (NASDAQ: GENZ).
Amgen Inc. (AMGN)
AS OF DATE Short Int. Change
06/13/2008 48,430,933 113.55%
05/30/2008 22,678,517 -8.48%
Gilead Sciences Inc. (NASDAQ: GILD)
AS OF DATE Short Int. Change
06/13/2008 34,676,528 6.77%
05/30/2008 32,478,444 -0.65%
Celgene Corporation (NASDAQ: CELG)
AS OF DATE Short Int. Change
06/13/2008 12,951,360 -5.98%
05/30/2008 13,775,373 -15.68%
Biogen Idec Inc. (NASDAQ: BIIB)
AS OF DATE Short Int. Change
06/13/2008 7,467,264 17.66%
05/30/2008 6,346,464 -6.51%
Genzyme Corp. (NASDAQ: GENZ)
AS OF DATE Short Int. Change
06/13/2008 5,751,563 1.17%
05/30/2008 5,684,945 1.12%
Jon Ogg
June 25, 2008