In trading on Tuesday, shares of Triangle Petroleum Corp (TPLM) crossed below their last reported book value — defined as common shareholder equity per share — of $6.42, changing hands as low as $6.30 per share. Triangle Petroleum Corp shares are currently trading off about 3.2% on the day. The chart below shows the one year performance of TPLM shares, versus its 50 and 200 day moving averages:

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Triangle Petroleum Corp Moving Averages Chart

Looking at the chart above, TPLM's low point in its 52 week range is $6.30 per share, with $12.48 as the 52 week high point — that compares with a last trade of $6.38.

According to the ETF Finder at ETF Channel, TPLM makes up 1.28% of the PowerShares DWA Energy Momentum Portfolio ETF ( PXI) which is trading up by about 0.5% on the day Tuesday.