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After the restrictions imposed by Yahoo to avoid downloading historical data, we have fixed the problem and we offer all our users access to our own API in order to download historical quotes with the Yahoo Finance format.
You can customize the download, according to your needs, in this way:
You can change stock, period1, period2, interval and events according to your needs.
The API key needed to be able to download the data is:
Please make moderate use of this service and do not perform massive downloads.