NEW YORK (TheStreet) -- Marathon Oil  (MRO - Get Report) stock's price target was raised at BMO Capital Markets this morning, jumping to $20 from $15.

The firm has a "market outperform" rating on the Houston-based oil exploration and production company.

Marathon Oil's acquisition of PayRock Energy was less of a "sticker shock" than BMO anticipated, closing for $888 million rather than Bloomberg's predicted $1.5 billion. The deal expands Marathon Oil's footprint in the STACK region and Kingfisher county, a 43% acreage increase.

"The purchase price appears attractive and type curve metrics... and well productivity... presented by Marathon suggest wellhead economics are competitive with the best of STACK," the firm added in an analyst note.

Shares of Marathon Oil plummeted 5.57% to $14.42 this morning, as the stock is also under pressure in the midst of a global sell-off following the results of the U.K. referendum.

Separately, TheStreet Ratings rated this stock as a "sell" with a ratings score of D.

The company's weaknesses can be seen in multiple areas, such as its poor profit margins, weak operating cash flow, generally disappointing historical performance in the stock itself, disappointing return on equity and feeble growth in its earnings per share. You can view the full analysis from the report here: MRO

TheStreet Ratings objectively rated this stock according to its "risk-adjusted" total return prospect over a 12-month investment horizon. Not based on the news in any given day, the rating may differ from Jim Cramer's view or that of this articles's author.