NEW YORK (TheStreet) -- MarkWest Energy Partners (MWE) was downgraded to "neutral" from "outperform" at Credit Suisse, which cut price target to $72 from $81.

MarkWest Energy Partners reported its 2015 second quarter financial results on Wednesday with fully reported loss of $0.55 per share on revenue of $459.63 million. This compares to earnings of $0.05 per share on revenue of $518.37 million for the same period one year ago.

Analysts surveyed by Thomson Reuters had forecast fully reported earnings of $0.16 per share on revenue of $575.1 million for the second quarter.

The firm also lowered its EBITDA and DCF guidance to $925 million to $975 million, and $700 million to $750 million, according to the analyst note.

"The guidance reduction follows a continued period of low commodity prices that is expected to impact MarkWest's volumes," Credit Suisse analysts said.

MarkWest Energy Partners, based in Denver, is a natural gas company that is engaged in the gathering, transportation, fractionation, storage and marketing of natural gas liquids (NGLs), and crude oil.

Shares of MarkWest Energy Partners are down 2.16% to $53.88 in mid-morning trading Friday.

Separately, TheStreet Ratings team rates MARKWEST ENERGY PARTNERS LP as a Hold with a ratings score of C. TheStreet Ratings Team has this to say about their recommendation:

"We rate MARKWEST ENERGY PARTNERS LP (MWE) 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 good cash flow from operations, expanding profit margins and largely solid financial position with reasonable debt levels by most measures. However, as a counter to these strengths, we also find weaknesses including a generally disappointing performance in the stock itself, unimpressive growth in net income and feeble growth in the company's earnings per share."

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