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Where are companies like finnhub.io or finance portals getting their data from?

Do they fetch the historical stock quotes from the exchanges directly? If so, the have to collect the data from a lot of different exchanges over the world, which must be quite expensive because if the prices the exchanges charge.

And where do they get all the financial data like balance sheets from?

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i would've said to email them, but the link you provided is a domain for sale.

anyway, if a company wants to be supplied something, they go to the source. who could possibly be generating balance sheets for a "global stock". well, the company that issued that global stock. The data provider takes the financial data from the source (paid or by some other deal) and puts it on display to their own (possibly wider) audience.

as for trading data, stock exchanges have to track all that info, so the data provider, you guessed it, once again goes to the source for that dataset (paid or by other deals, possibly with some telecom intermediary that has ties to multiple international stock exchanges) and re-distributes it.

it wouldn't be hard for a site to replicate financial data from another site that's online though, using some sort of automated macro API that copies and pastes.

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  • $\begingroup$ Thanks, I've corrected the URL $\endgroup$ – eztam May 28 at 16:49
  • $\begingroup$ I mean, finnhub.io covers around 50000 stocks world wide and has historical financial data for all of them. I assume they are not extracting this numbers from the company reports by them selfs. Somebody must offer this data. $\endgroup$ – eztam May 28 at 16:52
  • $\begingroup$ yes it does seem that would be more efficient for them $\endgroup$ – develarist May 28 at 16:53
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American companies financials is generally straight from the securities authority responsible for free, it is easy to create your own api for USA stuff free and easily available, the share price data is also freely available from the exchanges direct, Nasdaq , NYSE etc.Not so Australia, the ASX has a strangle hold on all data and charges like a wounded bull for Historical access greater than 2 years, you can get 5 years on some sites but you have to sign up and you will be bombarded with spam forever. They are the only sites I visit, I abandoned Australia as a lost cause because of their complete lack of transparency. It is shocking. You could be buying a chocolate coated turd on the ASX you would have no real accurate way of knowing without coughing up large sums of cash.

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