But those were one-time breaches related to patchable software flaws, and nobody knew for sure if a national-backed entity did it (maybe except Stuxnet https://en.wikipedia.org/wiki/Stuxnet). They were not hardware and not directly linked to the Chinese government.
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I don't know, previous revelations of wide scale breaches haven't affected the target companies that much.
But those were one-time breaches related to patchable software flaws, and nobody knew for sure if a national-backed entity did it (maybe except Stuxnet https://en.wikipedia.org/wiki/Stuxnet). They were not hardware and not directly linked to the Chinese government.
They almost all cause an immediate loss in value though. Knowing that knowledge beforehand would net someone a lot of money.
Especially around earnings season...