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Or it means the CEO wants to buy a yacht.

Either way if you think it's such a strong signal about company's prospects, go ahead and short companies whose CEO are selling the stock.

CEO stock sale is public information. Disclosing those sales is mandated by FCC.

You have no excuse for not being very rich.

Alternatively, CEOs are selling stock for variety of reasons and you can't make judgements about the company with confidence greater than 50%. And lower confidence is basically a random coin toss.

Yes, stock sales by insiders is public information. Just a small correction. Stock sale disclosure is mandated by SEC, not FCC.

It is also not public information. They have to disclose it just to the SEC. Several companies also release their executives' trades to the public by default, but it is not mandatory.

You are showing confidence in the company by sticking around through the vesting cycle. For CEOs that period is often five to ten years. Selling it after that to buy a house or whatever isn't some confidence signal. At some point you just need the cash.

No, it means you're smart enough to know what risk is.