They could file for a 5 day extension, but I don't see them doing that because they've never done that before. Even if they do, I'm ok with a 5 day delay. Anything over that might indicate problems with the Fins, so I think we'd see some selling IMO.
I would stay in, I'm here until the bitter end. To paraphrase Rudyard Kipling, make a pile of all your winnings, bet it on a single game of pitch and toss, and lose, and start again at your beginnings, without a single murmur about your loss.