XBI had the good fortune of being the only biotech ETF with Puma exposure. The surge in market cap took Puma from less than 1.4% of XBI’s weight on Tuesday to almost 4.7% of the ETF as of Thursday’s close. [Puma Pumps up Biotech ETFs]

Global ETFs have been in style in recent weeks and this week’s search trends confirmed as much. The EGShares Emerging Markets Consumer ETF (NYSEArca: ECON) and the iShares MSCI Emerging Markets ETF (NYSEArca: EEM) battled it out for top honors among the most searched diversified emerging markets ETF in a race that is still too close to call.

With China ETFs continuing to gain strength, the SPDR S&P China ETF (NYSEArca: GXC) makes its first appearance on the most searched list. GXC has recently lagged its larger rival, theiShares China Large-Cap ETF (NYSEArca: FXI), but the former offers broader exposure to China and, over longer time frames, has displayed noticeable out-performance of FXI.

The Vanguard Short-Term Bond ETF (NYSEArca: BSV) was the week’s most searched bond ETF while the SPDR Gold Shares (NYSEArca: GLD) the lead among commodities funds.

PowerShares QQQ

Tom Lydon’s clients own shares of Apple, Amazon, Facebook, Microsoft, EEM, QQQ and GLD.