Tim Cook better worry about getting the stock price up a lot more than Google and Microsoft. That and where his next job is going to be.
Tim Cook isn’t worried about the stock price. They will simply by back enough stock to keep it where he wants to keep it. They have tons of cash. They can do that.
In fact, they’ll use their foreign cash to do it, since they can’t bring that cash back into the US without paying a massive tax on it.