February 2013
Beginner
288 pages
6h 31m
English
Content preview from Get Started in SharesBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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How are indices calculated?
A market index is simply an aggregate value of a group of shares tracked over time. But the way in which these are calculated varies; you can do the aggregating in different ways.
The Dow Jones
The first index, the Dow Jones Industrial Average (DJIA, the Dow), was created over 100 years ago. Charles Henry Dow gathered together the prices of 12 large US shares and simply averaged the prices (the statistic was published in the Wall Street Journal).
If one company in that list had a market capitalisation 20 times greater than another, that was ignored – it was purely based on share price. Later, the metric was expanded so that now 30 shares are included in the Dow. To be precise, we should say that the Dow is not an index ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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