[DeathArrow]

But not only the physicians know a CEO will be out of commission. And there are many more cases where a CEO will leave a company without being ill.

And there are much more situations that will influence stock prices than a company changing its CEO. Those situations can be both internal and external to a company.

So I think we potentially have thousands or tens of thousands of people who learn information that make them rich if they act quickly. And even that has a multiplying factor since those people have friends and family.

"Hey Bill, wanna make a quick buck? As soon as market opens buy XYZ. You don't know it from me and I didn't call you today."

[LeafItAlone]

Also, most of the situations you are describing are not insider trading. If Warren Buffett calls his secretary and tells them he needs to go to the hospital because he’s having a heart attack, and they short BH on the way, that _could_ be considered insider trading. If I’m a nurse at that hospital and I’m on break outside and watch Buffett being wheeled in on a gurney and I trade on that, that would generally not be.

[LeafItAlone]

>But not only the physicians know a CEO will be out of commission.

Ok, but I was responding to a specific claim from the parent comment specifically mentioning physicians.