In the last trading session, U.S. stocks were mixed. Among the top ETFs, investors saw SPY gain 0.2%, (DIA Quick QuoteDIA - Free Report) lose 0.2%, and (QQQ Quick QuoteQQQ - Free Report) move higher by about 0.7% 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:

(PTH Quick QuotePTH - Free Report) : Volume 3.97 times average

This financial ETF was in the spotlight on Wednesday as about 83,012 shares moved hands compared with an average of 20,900 shares a day. We also saw some price movement as PTH gained about 1.7% last session.

Overall, the healthcare sector is upbeat. The sector’s non-cyclical nature probably has helped it to rule out market jitters emanating from trade tensions. PTH has jumped 9.6% in the past month.

(PCY Quick QuotePCY - Free Report) : Volume 3.48 times average

This emerging market sovereign debt ETF was under the microscope on Wednesday as nearly 5.8 million shares moved hands. This compares with an average trading day of roughly 1.7 million shares and came as PCY gained about 0.2% in the trading session. The fund has lost about 1.7% in a month’s time. The movement can largely be credited to growing pain in the emerging market space thanks to rising rates in the United States.

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