In the last trading session, U.S. stocks were in the red on global growth concerns. A slowing Chinese economy and the Fed’s dovish stance point to a still-fragile global economy. For the top ETFs, investors saw SPY  lose about 2.1%, DIA shed over 2% and QQQ move lower by about 2.8% 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, both these funds experienced volume levels that were more than double their average for the most recent trading session. This could make these ETFs ones to watch in the days ahead to see if this trend of extra-interest continues:

(DGS - ETF report): Volume 3.11 times average

This emerging market small-cap dividend ETF was in focus Friday as roughly 436,500 million shares moved hands compared to an average of roughly 140,000 shares. We also saw some stock price movement as shares of DGS lost about 1% yesterday.

The move was the result of a recent turmoil in China following the manufacturing slowdown or the Yuan devaluation. The latest Chinese currency devaluation sparked off fears of a currency war among these Asian nations to maintain their export competitiveness as these can have a huge impact on the Asian stocks like what we find in this ETF’s portfolio. For the month, DGS is down about 12%.

(SCHB - ETF report): Volume 3.02 times average

This U.S. broad market ETF was under the microscope yesterday as nearly 1.7 million shares moved hands. This compares to an average trading day of 545,960 shares and came as SCHB retreated about 2.2% on the session.

The movement can largely be blamed on the rout in the global market due to the slump in oil prices, a reduced prospect of a sooner-than-expected Fed lift-off and upheaval in the Chinese economy. SCHB was down about 3.8% in the past one-month period.