PowerShares Buyback Achievers Portfolio (NYSEArca: PKW)
AUM as of Nov. 8: $2.03 billion
2013 growth: $1.62 billion
Comment: There are several interesting superlative regarding PKW, not the least of which is the fact that the ETF has outpaced the S&P 500 by nearly 2,300 basis points over the past three years. Then there is the fact that of all the PowerShares ETFs, an expansive lineup, PKW made the jump to $2 billion from $1 billion faster than any other. PKW is so successful it could soon get an international cousin. [PowerShares Plans Global Answer to PKW]