Government shutdown markets resolve on a legislative deadline, and the real signal is procedural: which of the twelve appropriations bills have passed, whether a continuing resolution has been introduced, what the Rules Committee has scheduled, and how many days of floor time remain. All of that is public and structured. You track the procedural state machine rather than the cable-news temperature, and trade the countdown markets that price on rhetoric.
Markets on Polymarket where shutdown countdown appropriations tracker is the natural play: