Towards the end of last week, U.S. stocks were in red as rising rate worries in the upcoming Fed policy meet and an overall shaky global backdrop did not pay much heed to the stimulus talks in China and Japan. Among the top ETFs, investors saw SPY lose over 1.3%, DIA
add about 1.5% and QQQ move lower by over 1.1%.

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:

(GSC - ETF report): Volume 3.64 times average

This broader commodity ETN was under the microscope last week as nearly 104,000 shares moved hands. This compares to an average trading day of 28,500 shares and came as GSC lost about 1.8% in the session.

The movement was due to the broader commodity market slump which aggravated on Chinese growth worries and a relatively stronger greenback. GSC is down about 6% in the past one-month period.

(VONG - ETF report): Volume 3.00 times average

This large-cap growth U.S. equities ETF was in focus last week as roughly 63,315 shares moved hands compared to an average of roughly 21,000 shares. We also saw some stock price movement as shares of VONG fell over 1.4%.

Global growth worries and talks over the timing of the Fed rate lift-off hurt the growth stocks like what we find in this ETF’s portfolio. The fund has a Zacks ETF Rank #1 (Strong Buy). However, for the month, VONG is down about 6.8%.