Following U.S. Stocks were among the “Top Losers” during Monday’s trade: Axion Power International, Inc (NASDAQ:AXPW), Zogenix, Inc (NASDAQ:ZGNX), Vanguard Natural Resources, LLC (NASDAQ:VNR), Rex Energy Corporation (NASDAQ:REXX)

Their insights are depicted underneath:

Axion Power International, Inc (NASDAQ:AXPW)’s shares dwindled -8.73%, and closed at $0.162, hitting new 52-week low of $0.15. The stock volatility for the week is 30.63%, while for the month remained 30.99%.

Axion Power International, Inc. is engaged in the design, development, manufacture, and sale of advanced energy storage devices, components, and systems based on its patented PbC Technology.

Zogenix, Inc (NASDAQ:ZGNX), declined -9.04%, and closed at $1.71.

According to Zacks Equity Research, Zogenix, Inc. (ZGNX), has seen one positive revision in the past one month, while its Zacks Consensus Estimate moved higher over the same time frame, suggesting that more solid trading could be ahead for this medical drugs stock. So make sure to keep an eye on this stock going forward to see if this recent jump can turn into more strength down the road.

Zogenix presently carries a Zacks Rank #2 (Buy) while its Earnings ESP is 0.00%.

Vanguard Natural Resources, LLC (NASDAQ:VNR), dipped -9.04%, and closed at $14.73.

According to GLOBE NEWSWIRE, Vanguard Natural Resources, LLC (VNR), stated financial and operational results for the full year and fourth quarter ended December 31, 2014.

Fourth Quarter 2014 Highlights:

• Adjusted EBITDA (a non-GAAP financial measure defined below) raised 69% to $125.6 million from $74.3 million in the fourth quarter of 2013 and raised 16% contrast to the $108.2 million recorded in the third quarter of 2014.
• Distributable Cash Flow Accessible to Ordinary and Class B Unitholders (a non-GAAP financial measure defined below) raised 73% to $73.9 million contrast to the $42.7 million generated in the fourth quarter of 2013 and raised 39% from the $53.0 million generated in the third quarter of 2014.
• We stated a net loss for the quarter of $66.8 million or $(0.80) per basic unit after deducting distributions to Preferred unitholders contrast to a stated net revenue of $0.9 million or $0.01 per basic unit in the fourth quarter of 2013.
• Adjusted Net Revenue Accessible to Ordinary and Class B Unitholders (a non-GAAP financial measure defined in the supplemental presentation posted at www.vnrllc.com) was $16.1 million in the fourth quarter of 2014, or $0.19 per basic unit, as contrast to $10.9 million, or $0.14 per basic unit, in the fourth quarter of 2013. The recent quarter comprises net non-cash expenses of $82.5 million that are adjustments to arrive at Adjusted Net Revenue Accessible to Ordinary and Class B Unitholders. The 2014 adjustments comprise a $234.4 million impairment charge on our oil and gas properties offset by a $155.9 million gain from the change in fair value of commodity derivative contracts. The fourth quarter of 2013 results comprise net non-cash expenses of $10.0 million.
• Stated average production of 402,164 Mcfe per day in the fourth quarter of 2014 was up 82% contrast to 221,415 Mcfe per day produced in the fourth quarter of 2013 and a 25% raise contrast to the third quarter of 2014. On an Mcfe basis, crude oil, natural gas and NGLs accounted for 15%, 71%, and 14% of our production, respectively.

Vanguard Natural Resources, LLC is a publicly traded limited liability corporation focused on the attainment, production and development of oil and natural gas properties.

Rex Energy Corporation (NASDAQ:REXX), dropped -8.60%, and closed at $4.25. The company has the market capitalization of $256.99M. The beta value of the stock is 1.13. On the other hand the stock’s volatility for the week is 6.47%, and for the month is 7.85%. The stock price to book value is $0.43, however price to sale value is $0.79. Analyst’s mean recommendation regarding this stock is 0.79. (where 1=Buy, 5=Sale).

Rex Energy Corporation operates as an independent oil, natural gas liquid, and natural gas corporation in the Appalachian and Illinois basins in the United States.