It was an active week on Wall Street, particularly when considering we’re into the heart of the dog days of summer. Federal Reserve commentary and renewed fears about Europe’s PIIGS will do that.

European stocks and the corresponding U.S.-listed exchange traded funds struggled this week on concerns over Espirito Santo Financial Group, the country’s largest bank. Problems in Portugal’s banking sector reveals the precarious recovery in parts of the Eurozone periphery and serves as a potential warning against excessive optimism in some peripheral markets.

On Thursday, the Federal Reserve gave its first overt hint about when it will end its quantitative easing regime with some members of the central bank signaling QE will conclude in October.

Oh yeah, next week brings an avalanche of financial services sector earnings reports. So much for the summer doldrums. With that, here are some of this week’s most popular stories from ETF Trends.

Sector ETFs

It was another huge week for gold miners ETFs, but the party may just be getting started.

Meet this year’s top-performing technology ETF and a surprising one at that. [This Year’s Top Tech ETF]

A favorable interest rate environment continues to help REIT ETFs.

Global ETFs

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