How will deadlock in debt talks play out in forex markets?

With the US government shutdown weighing on the dollar, FT currencies correspondent Delphine Strauss is joined by Derek Halpenny, European head of global market research at the Bank of Tokyo-Mitsubishi. Can forex markets remain this calm if the debt talks drag on into next week? How much higher can the euro go? And with the yen’s weakness apparently set to continue, what changes in behaviour might we see from Japanese institutional and retail investors?