Expiring 401(k) Stock Option and Liquidation Implications
It might go down a bit, or it might not. That is nearly impossible to predict, as the relative volumes are unknown, and the exact procedure is also unknown (they might do the selling over a longer period, or as a buy back, or immediately, or...) However, why would you want to wait at all? It is generally not a great idea to put your savings into the company you work for ('all eggs in one basket' - when it goes down, you lose your job and your savings), so the best approach is to pick a good day in the next weeks and sell the stock and invest into something more neutral.