From the admittedly small data set of 6 tweets, it looks like the answer is "no" with one exception where the market took over an hour to react. I'm curious why the Ford lag time was so different.
His other tweets regarding other companies were all future-tense, and companies he is in a position to bully. Except for Nordstrom, of course.
What would be needed? A line? Programmable robots? Inputs and outputs?
Interesting idea.