(Bloomberg) -- Bond traders who struggled to predict how high the Federal Reserve would raise interest rates are finding the way down just as vexing.Most Read from BloombergHow Americans Voted Their Way Into a Housing CrisisWorld's Second Tallest Tower Spurs Debate About Who Needs ItThe Plan for the World’s Most Ambitious Skyscraper RenovationUC Berkeley Gives Transfer Students a Purpose-Built Home on CampusRome May Start Charging Entry to the Trevi FountainAt TCW Group Inc., Jamie Patton, the c