He really has no such obligation. Do you have any idea how many things a CEO knows that might negatively impact the share price of an organisation?
He has the obligation to release certain specific information mandated by the SEC in a timely manner (details of his health are not on the list - it's largely financial) and there are certain things a company can not say (which basically boils down to honesty).
The SEC also say he and the company have to communicate in a particular way when information is shared (for instance so it's available to the whole market - no selective disclosure, and again it has to be honest and truthful and so on) and projections are heavily caveated.
The on top of that he has a general legal obligation to act in the best interests of share holders.
But there's no blanket reveal all, and nothing that specifically covers his health and I'm not sure why you think there is or where it comes from. Could you quote the specific authority or law in question?
He has the obligation to release certain specific information mandated by the SEC in a timely manner (details of his health are not on the list - it's largely financial) and there are certain things a company can not say (which basically boils down to honesty).
The SEC also say he and the company have to communicate in a particular way when information is shared (for instance so it's available to the whole market - no selective disclosure, and again it has to be honest and truthful and so on) and projections are heavily caveated.
The on top of that he has a general legal obligation to act in the best interests of share holders.
But there's no blanket reveal all, and nothing that specifically covers his health and I'm not sure why you think there is or where it comes from. Could you quote the specific authority or law in question?