In the last trading session, U.S. stocks were in the green. Among the top ETFs, investors saw SPY gain over 1.2%, DIA advance about 1.3% and QQQ move higher by about 1.4% 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 out for in the days ahead to see if this trend of extra interest continues: HEWJ: Volume 7.11 times average This currency-hedged Japan equities ETF was in focus yesterday as roughly 6.76 million shares moved hands compared with an average of roughly 949,650 shares. As the Japanese currency yen lost strength in the wake of intervention warnings from Tokyo following the currency's fast ascent, Japanese equities soared. We also saw some price movement as shares of HEWJ returned about 3.5% yesterday. The fund has a Zacks ETF Rank #2 (Buy). In the last one month, HEWJ was up about 5.7%. GREK: Volume 3.18 times average This Greece ETF was under the microscope yesterday as nearly 1.19 million shares moved hands. This compares to an average trading day of 375,920 shares and came as GREK added about 1.8% in the session. The movement was due to talks between Greece and its Eurozone creditors about easing the former’s debt burden. GREK was up over 18.5% in the past one-month period. Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. . Click to get this free report >> Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report ISHA-CH MS JAP (HEWJ): ETF Research Reports GLBL-X/F GREC20 (GREK): ETF Research Reports To read this article on Zacks.com click here. Zacks Investment Research Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report