Traders who’ve amassed the largest bet on record against the yen are at a crossroads: Do they stick with their shorts despite signs that Japan is intervening in foreign-exchange markets to prop up the currency? The weekly release of foreign-exchange positioning data by the Commodity Futures Trading Commission is typically not a cause for major concern — largely because the information comes out at 3:30 p.m. New York time on Fridays, when other markets around the world are settling into their weekends. But, leveraged funds and asset managers were last seen holding more than 184,000 contracts tied to wagers the yen ... (full story)