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S&P downgrades Oracle stock to BBB-
(www.heise.de)
This is a most excellent place for technology news and articles.
Amazon was junk level for a long time. I don't think it's uncommon for early, "grow fast at all costs" companies to have poor credit ratings. Though, Oracle really isn't an early stage company.
Oracle is 50 years old. Most public tech companies aren't even half that mature.