ETFs tracking the newly rebalanced Russell indexes received a lickety-spit makeover Monday. The large-cap index tracked by the $11.3 billion iShares Russell 1000 (IWB) gained 48 stocks including biotech firms Receptos (RCPT) and Bluebird Bio (BLBD). It also lost 50 companies such as Advanced Micro Devices (AMD) and retailer Big Lots (BIG).