The Brexit deal has taken so long to figure out that it mostly seemed hopeless. Markets were legitimately pricing in the chances of a no-deal Brexit. Now, the EU and UK have announced they have come to a provisional agreement. While that is cause for some relief, it is very far from a done deal as both the UK and European Parliaments need to endorse the agreement. The UK side in particular may be tricky as PM Theresa May needs to rally an extremely factionalized government behind her.
FINSUM: This could go many ways, but we think either everything will just fall into place quietly, or there will be major fireworks