Business
Why the Dow topped 30,000 for the first time, and why it’s a big deal – Sydney Morning Herald
It’s an attention-grabbing psychological threshold, and it’s an encouraging signal that the US market’s rally is broadening beyond the handful of stocks that carried…

What is the Dow, exactly?
Its a measure of 30 US companies, mostly blue-chip stocks spread across a range of industries. They include tech stars like Apple and Microsoft, as well as more traditional industrial companies like Boeing and Caterpillar. Other behemoths in the Dow include Nike and The Walt Disney Co.
Unlike many other measures of the market, the most important thing for the Dow is how big a stocks price is, not how much a company is worth in total.
That means a 1 per cent move for UnitedHealth…
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