UBS' family of exchange traded products, ETRACS, welcomed a new member with a familiar face Wednesday: ETRACS Alerian MLP Index ETN (AMU). It's the same as JPMorgan Alerian MLP Index ETN (AMJ), but with a slightly lower annual management fee of 0.80% vs. 0.85% for AMJ. ETRACS is picking up where JPMorgan left off. A month ago, JPMorgan announced limiting the creation of AMJ shares to 129 million. AMJ is the most popular exchange traded note with