431 shares traded is the secret Q-Anon code to indicate that Elon Musk is going to allow Trump back on Twitter so long as he shares an account with JFK, Jr (who is still alive, by the way) and then the two of them are going to run for Pres/VP on the 2024 ticket, after Trump has had transgender surgery and changed his name to Deana, attempting to become the first-ever woman to be elected President, just because he wants to piss off both the conservatives and the liberals . . . and the chicks on The View.
At least that's what a 431 share trade meant last year, but as you intimated, the secret codes change periodically so it may mean something different now.