In the last trading session, U.S. stocks were slightly subdued. Among the top ETFs, investors saw (SPY Quick QuoteSPY - Free Report)  shedding about 0.13%, (DIA Quick QuoteDIA - Free Report)  losing about 0.3% and (QQQ Quick QuoteQQQ - Free Report)  move lower by 0.05% on the day.

Two more specialized ETFs are also worth watching 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 of the last trading session. This could make these ETFs ones to watch out for in the days ahead to see if this trend of extra-interest continues.

VDE: Volume 3.27 times average

This energy ETF was under the microscope yesterday as about 1.59 million shares changed hands. This compares to the average trading volume of around 485,580 shares and came as VDE lost about 1% in the session. Oil prices are on track for the first yearly decline in three years thanks to the ongoing concerns of a supply glut. The fund has lost about 16.7% in the past one month.

VIG: Volume 3.09 times average

This U.S. equities ETF, consisting of stocks of companies that have a record of increasing dividends over time, was in the spotlight yesterday as 4.49 million shares moved hands compared with an average of roughly 1.52 million shares a day. The fund lost about 0.05% in the last trading session and has been down about 10.7% in the past one month.

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