In the last trading session, U.S. stocks were mostly in the red. The absence of any addition or extension in ECB stimulus and uncertainty surrounding the timing of the Fed rate hike weighed on stocks. Among the top ETFs, investors saw (SPY Quick QuoteSPY - Free Report) lose about 0.23%, (DIA Quick QuoteDIA - Free Report) shed about 0.3% and (QQQ Quick QuoteQQQ - Free Report) retreat about 0.6% on the day.

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

(DWAS Quick QuoteDWAS - Free Report) : Volume 3.61 times average

This U.S. small-cap momentum ETF was under the microscope on Thursday as nearly 97,500 shares moved hands. This compares to an average trading volume of 28,000 shares and came as DWAS gained about 0.1% in the session.

The movement can be credited to the ongoing U.S. economic recovery. In the last one-month period, DWAS was up about 2.9%.

(EWP Quick QuoteEWP - Free Report) : Volume 2.96 times average

This Spain ETF was in focus yesterday as roughly 3.9 million shares moved hands compared with an average of roughly 1.33 million shares. EWP gained about 1.6% on the day. In the last one-month period, EWP was up over 6.9%. The fund has a Zacks ETF Rank #3 (Hold).

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