In the last trading session, U.S. stocks climbed the most in two and half years as fears over trade worries eased. Among the top ETFs, investors saw (SPY - Free Report) gain 2.75%, (DIA - Free Report) rise 2.85%, and (QQQ - Free Report) move higher by 3.72% 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:

(PRFZ - Free Report) : Volume 4.78 times average

This small-cap ETF was in the spotlight yesterday as about 262,000 shares moved hands compared with an average of 55,000 shares a day. We also saw some price movement as PRFZ gained nearly 2% last session.

The big move was largely the result of a strong rally that can leave a huge impact on small-cap stocks like what we find in this ETF portfolio. PRFZ has risen 1.6% in the past one month and has a Zacks ETF Rank #3 (Hold) with a Medium risk outlook.

(VDC - Free Report) : Volume 2.96 times average

This consumer discretionary ETF was under the microscope yesterday as nearly 424,000 shares moved hands. This compares with an average trading day of roughly 149,000 shares and came as VDC added about 1.4% in the trading session.

The movement can largely be blamed on investors’ renewed confidence in the economy. VDC was down 3% in a month’s time and has a Zacks ETF Rank #3 with a Medium risk outlook.