In the last trading session, U.S. stocks gave mixed reaction as tech rally partially offset the weak manufacturing data and new developments in global trade. Among the top ETFs, investors saw (SPY Quick QuoteSPY - Free Report) added 0.1%, (DIA Quick QuoteDIA - Free Report) shed 0.3% and (QQQ Quick QuoteQQQ - Free Report) move higher by 1.1% on the day.

Two more specialized ETFs are worth noting as both saw trading volume that was far outside of normal. In fact, both these funds experienced volume levels that were more than double their average for the most recent trading session. This could make these ETFs the ones to watch out for in the days ahead to see if this trend of extra-interest continues:

(FIDU Quick QuoteFIDU - Free Report) : Volume 8.78 times average

This industrial ETF was under the microscope yesterday as nearly 1.4 million shares moved hands. This compares with an average trading day of roughly 163,000 shares and came as FIDU lost about 0.4% in the trading session.

The big move was largely the result of weak production data that can have a huge impact on the industrial stocks like what we find in this ETF portfolio. FIDU has lost 3% in the past month and carries a Zacks ETF Rank #2 (Buy) with a Medium risk outlook.

(FXN Quick QuoteFXN - Free Report) : Volume 3.76 times average

This energy ETF was in the spotlight yesterday as about 924,000 shares moved hands compared with an average of 257,000 shares a day. We also saw some price movement as FXN shed 0.5% last session.

The movement can largely be blamed on spike in oil price that have brightened the outlook for the energy sector. FXN was down 9.8% in a month’s time and has a Zacks ETF Rank #3 (Hold with a Medium risk outlook.

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