In the last trading session, U.S. stocks witnessed a rocky ride given the lingering U.S.-China trade woes. Among the top ETFs, investors saw (SPY - Free Report) shed 0.6%, (DIA - Free Report) lose 0.4%, and (QQQ - Free Report) move 1.2% 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.

(QDF - Free Report) : Volume 6.45 Times Average

This dividend ETF was under the microscope as 583,000 shares moved hands. This compares with average trading volume of roughly 99,000 shares and came as QDF lost 0.6% in the trading session.

The move was largely the result of heightened uncertainty and market volatility that are compelling investors to flock to safer avenues and can have a big impact on dividend stocks like what we find in this ETF portfolio. QDF has lost 3% over the past month.

(SMH - Free Report) : Volume 2.61 Times Average

This semiconductor ETF was in the spotlight as around 19.5 million shares moved hands compared with average 7 million shares a day. We also saw some price movement as SMH lost 1.9% in the last session.

The movement can largely be blamed on escalation in trade tensions that crushed semiconductor stocks as chip makers have significant exposure to China. SMH has lost 10.5% in a month’s time and has a Zacks ETF Rank #2 (Buy) with a High risk outlook.