In the last trading session, U.S. stocks saw see-saw trading, falling for most of the day before rising again in late hours. Among the top ETFs, investors saw (SPY Quick QuoteSPY - Free Report) gaining 0.8%, (DIA Quick QuoteDIA - Free Report) adding 1.1%, and (QQQ Quick QuoteQQQ - Free Report) move higher by 0.4% 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:

(FHLC Quick QuoteFHLC - Free Report) : Volume 5.14 Times Average

This healthcare ETF was under the microscope as 2.1 million shares moved hands. This compares with an average trading day of roughly 439,000 shares and came as FHLC shed 1.1% in the trading session.

The big move was largely the result of high uncertainty, leading investors’ defensive tilt that can have a big impact on healthcare stocks like what we find in this ETF portfolio. FHLC has lost 7.1% over the past month and carries a Zacks ETF Rank #2 (Buy) with a Medium risk outlook.

(SCHV Quick QuoteSCHV - Free Report) : Volume 4.80 Times Average

This value ETF was in the spotlight as more than 4.2 million shares moved hands compared with an average of 939,000 shares a day. We also saw some price movement as SCHV gained 1% in the last session.

The movement can largely be blamed on heightened volatility that led to higher appeal for value ETFs. SCHV has shed 7.8% in a month’s time and carries a Zacks ETF Rank #1 (Strong Buy) with a Medium risk outlook.

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