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Date: Wed, 06 Jul 2005 18:47:52 -0700
From: DH <catapult@xxxxxxxxxxxxxxxxxx>
> The cap weightings don't look like the ones off of nasdaqtrader.
Nasdaqtrader's list appears out of date so their weightings probably are
too. SPOT was removed from the index almost a year ago.
Unless there have been major changes, the weightings should still be
in the 'neighboorhood'.
http://www.nasdaq.com/indexshares/historical_data.stm
I'd always go by the official NASDAQ site rather than some third
party.
But the third parties actually trade the interesting bits.
PS - remember to work in percentages rather than points when building
your own index from the cap weightings -- MSFT moves 1%, the index moves
.07%.
Actually the data from nasdaqtrader allowed me to calculate the
scalers for multiplying the current last price of a stock (and then
summing over the index components) to create the predicted index
value. So MSFT moves 1 pt, the index moves about 4.
Thanks again. Poking at this again now...
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