SPDR KBW Bank ( KBE) +8.5% iShares Dow Jones U.S. Regional Banks ( IAT) +7.2% These banking ETFs have some of the weakest momentum in the ETF universe, aside from double-short ETFs. Banks finally rebounded this week, however. It was the smaller regional banks such as Fifth Third Bancorp ( FITB) -- accounting for 2.87% of IAT but up 11.8% for the week -- that pushed up the fund. U.S. Bancorp ( USB), which accounts for 19.34% of IAT, gained only 3.6% for the week. iShares Israel ( EIS) +6.1% iShares Turkey ( TUR) +6.3% Market Vectors Indonesia ( IDX) +7.9% Emerging markets climbed on the market rally this week, and the already strong TUR and IDX added to their winning streak. EIS joined in this week; it has racked up a 19.1% gain in the past three weeks. These ETFs have room to run as long as the global equity markets continue their winning streak, but Indonesia was helped this week by a positive report from the IMF. PowerShares Lux Nanotech ( PXN) +6.5% Veeco Instruments ( VECO) grew to 7.83% of PXN after gaining 29% this week on an improved forecast for the second half and an upgrade from Citigroup ( C). Volatility is a staple with the holdings in this fund. On Friday, Headwaters ( HW), 4.78% of assets, fell 11%.