Ian Talley at WSJ reports:
In, “The Curious Case of the Yen: A Safe Haven Currency without Inflows” (see p.142) the IMF studied 11 shocks between the August 1990 U.S. savings and loan crisis and the August 2011 U.S. debt ceiling confrontation that pushed the volatility index 10 percentage points higher than its previous 60-day average. “The yen has tended to appreciate on average during these episodes, against the U.S. dollar, the euro and in nominal and real effective terms,” the IMF found.
Read more at Buy Yen on Debt Debacle? – Real Time Economics – WSJ.