AMEX
Biotechnology Index (BTK)
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here for current quotes of index components
Index description (from the official
AMEX website)
The Biotechnology Index is designed to measure the performance of a cross section of
companies in the biotechnology industry that are primarily involved in the use of
biological processes to develop products or provide services.
The Index is equal-dollar weighted, designed to ensure that
each of its component securities is represented in approximate equal dollar value.
Equal-dollar weighting was established by designating the number of shares of each
component security that represented approximately $10,000 in market value, based on
closing prices on Oct. 18, 1991 (e.g., a stock that closed at $20 per share would be
represented in the Index by 500 shares for a total market value of $10,000). The aggregate
value of the stocks was reduced by a divisor (initially 750.1506) to establish an Index
benchmark value of 200.00.
To ensure that each component stock continues
to represent approximate equal market value, adjustments are made quarterly after the
close of trading on the third Friday of January, April, July and October.
| Company Name |
Ticker Symbol |
| Affymetrix, Inc |
AFFX |
| Amgen Inc. |
AMGN |
| AppleraCorp-Celera Gen Group |
CRA |
| Biogen Inc. |
BGEN |
| Cephalon Inc. |
CEPH |
| Chiron Corporation |
CHIR |
| COR Therapeutics Inc. |
CORR |
| Genentech Inc. |
DNA |
| Genzyme Corporation |
GENZ |
| Gilead Sciences Inc. |
GILD |
| Human Genome Sciences, Inc. |
HGSI |
| IDEC Pharmaceuticals Corp. |
IDPH |
| Immunex Corporation |
IMNX |
| Medimmune Inc. |
MEDI |
| Millennium Pharmaceuticals, Inc. |
MLNM |
| Protein Design Labs Inc. |
PDLI |
| Vertex Pharmaceuticals Inc. |
VRTX |
AFFX,AMGN,CRA,BGEN,CEPH,CHIR,CORR,DNA,GENZ,GILD,HGSI,IDPH,IMNX,MEDI,MLNM,PDLI,VRTX
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