PS: If you're holding Argentina bonds this weekend, prepare to have a very good day tomorrow.
UPDATE: With 84% of votes counted Scioli now has a slight lead, with 35.7% to Macri's 35.3%. But that doesn't change the fact that this is an enormous upset result that very few people saw coming (again, your author included, I thought Scioli had a real chance of winning the whole thing today). And Macri will be favourite going into round two, while Scioli will bank on not having the Anibal Fernandez yoke around his neck in BsAs Prov. Hell's bells it's going to be one doozy of a run-off campaign.