In the last trading session, Wall Street was downbeat. Among the top ETFs, SPY declined 1.4%, DIA retreated about 1.1% while QQQ moved 2.1% lower 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.SPYV : Volume 4.80 Times AverageThis large-cap value ETF was under the microscope as about 14.96 million shares moved hands. This compares with an average trading volume of roughly 3.30 million shares and came as SPYV lost 1% in the last trading session. IJR is up 3.7% in a month’s time.IJJ: Volume 5.93 Times AverageThis mid-cap value ETF was in the spotlight as around 3.71 million shares moved hands compared with an average of 613, 330 million shares a day. We also saw some price movement as IJJ lost 0.9% in the last session. IJJ has increased 3.7% over the past month. Want key ETF info delivered straight to your inbox? Zacks’ free Fund Newsletter will brief you on top news and analysis, as well as top-performing ETFs, each week.Get it free >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Invesco QQQ (QQQ): ETF Research Reports SPDR S&P 500 ETF (SPY): ETF Research Reports SPDR Dow Jones Industrial Average ETF (DIA): ETF Research Reports iShares S&P MidCap 400 Value ETF (IJJ): ETF Research Reports SPDR Portfolio S&P 500 Value ETF (SPYV): ETF Research ReportsTo read this article on Zacks.com click here.Zacks Investment Research