Don't Build Up This Weak ETF (PKB)

There are still plenty of reasons to be apprehensive about investing in the construction and infrastructure sectors and that's why the ETF Professor is advocating taking a look at the PowerShares Dynamic Building & Construction ETF (NYSE: PKB) as a possible short play.

PKB holds familiar names such as Aecom Technology (NYSE: ACM), Home Depot (NYSE: HD) and Lowe's (NYSE: LOW), but PKB has substantially lagged the S&P 500 this year and looks ready to turn negative.

PKB is thinly traded and the chart shows volume has been waning as of late, perhaps indicating investor interest is going by the wayside.

PKB has languished below its 50-day moving average for several weeks and if support at $11 is violated, expect more downside.