As the Fed gets ready to taper ‘QE’, UBS' Larry Hatheway warns investors to brace for a period of increased international policy tension. Previously harmonized - but not coordinated - monetary policy stances will give way to conflicting objectives and new strains as adverse ‘spillovers’ occur. As Hatheway notes, we are about to rediscover several inconvenient truths. First, the Fed is the US, not the world’s, central bank. Second, international policy coordination is desirable in an interdependent world but, third, it is no more likely to materialize now than in the past. The world, it seems, is destined for a less comfortable policy co-existence in the coming few years.