In the last trading session, U.S. stocks saw terrible trading as trade war fears between the United States and its major allies escalated. Among the top ETFs, SPY lost 1.3%, (DIA - Free Report) was off 1.4% and (QQQ - Free Report) move lower by 2.2% 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 - Free Report) : Volume 9.26 times average

This industrial ETF was under the microscope yesterday as nearly 1.3 million shares moved hands. This compares with an average trading day of roughly 155,000 shares and came as FIDU added about 1.4% in the trading session.

The big move was largely the result of heightened trade tariff talks that can have a huge impact on industrial stocks like what we find in this ETF portfolio. The industrial sector is highly correlated to the moves of the broader market. FIDU has lost 3.8% in the past month and has a Zacks ETF Rank #2 (Buy) with a Medium risk outlook.

(MLPX - Free Report) : Volume 9.72 times average

This MLP ETF was in the spotlight yesterday as about 2.1 shares moved hands compared with an average of 250,000 shares a day. We also saw some price movement as MLPX shed 2.2% in the last session.

The movement can largely be blamed on the oil price volatility in the wake of a smaller-than-expected output boost by OPEC and global trade war fears. SCHO is down 3.8% in a month’s time.