The firm lowered the price target to $16 from $10 for the independent energy company.
BMO Capital cut annual EPS estimates to 33 cents from 46 cents for fiscal 2014, and to a loss of 41 cents from 76 cents for fiscal 2015.
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The firm also set annual cash flow per share estimates to $2.57 from $2.80 for fiscal 2014, and to $2.35 from $4.15 for fiscal 2015.
"Challenges are likely persist as the implied capital efficiencies aren't enough to drive attractive debt-adjusted growth or multiple compression, in addition to leverage creeping higher in 2015," said analyst Phillip Jungwirth of BMO Capital.
Separately, TheStreet Ratings team rates REX ENERGY CORP as a Hold with a ratings score of C-. TheStreet Ratings Team has this to say about their recommendation:
"We rate REX ENERGY CORP (REXX) a HOLD. The primary factors that have impacted our rating are mixed -- some indicating strength, some showing weaknesses, with little evidence to justify the expectation of either a positive or negative performance for this stock relative to most other stocks. The company's strengths can be seen in multiple areas, such as its robust revenue growth, reasonable valuation levels and increase in net income. However, as a counter to these strengths, we also find weaknesses including a generally disappointing performance in the stock itself, disappointing return on equity and generally higher debt management risk."