Wouldn't that volume for sale appearing on the market decrease the price in and of itself?
... and nothing will happen.
Couldn't you have posted a non-paywalled article so we don't have to discuss a headline?
CEOs have to announce they will sell in advance. But, I can't see if he did this because of what you posted.
Apologies, I run the Bypass Paywalls Clean extension for Firefox so I don't even notice when sites have paywalls (and I recommend everyone else do the same). It's right up there with adblockers as being almost an essential component of browsing the web these days.
https://github.com/bpc-clone/bypass-paywalls-firefox-clean
Here are a few more options for viewing the article without a paywall if you don't want to install an extension.
Oh NOOOOO! So you might point at this genius brain to tell us, he's just another fraudster? NOOOOoooooo! Who whould have thought? /s
The article is paywalled

Didn't Martha Stewart go to prison for this exact thing?
No. She went to jail for lying to the feds.
Her financial manager was suspected of insider trading. The FBI questioned her about it and she lied to them in an attempt to protect him.
Did her financial manager insider trade?
Probably. She was not found guilty of lying about her reason for selling the stock in question, though she was found guilty of obstruction and other lies, along with conspiracy.
She was never charged with insider trading, so if she hadn't lied, she would likely have been fine.
Interestingly, they also charged her with securities fraud. They argued that, as the face of a publicly traded company, covering up a crime was market manipulation even if it had nothing to do with that company. The judge dismissed that charge.
Damn, I hope Elmo lies to the feds. He's dumb enough to.
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