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."
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.
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."