NEW YORK (TheStreet) -- Vale (VALE) - Get Report stock is slumping by 2.59% to $4.13 in late-afternoon trading on Thursday, as a stronger Brazilian real weighs on exporters such as the Rio de Janeiro-based metals and mining company.

The currency soared to an eight-month high after the central bank sold only one-sixth of the foreign-exchange reverse-swap contracts it offered, Bloomberg reports. Auctioning the securities is akin to buying dollars in the futures market, and typically weakens the real. 

"The appreciation of the currency is very negative for exporters, which have already been suffering with weak commodity prices," Rafael Ohmachi, an analyst at brokerage Guide Investimentos, told Bloomberg.

Separately, TheStreet Ratings team rates the stock as a "sell" with a ratings score of D.

Vale's weaknesses include its deteriorating net income, disappointing return on equity, generally high debt management risk, generally disappointing historical performance in the stock itself and feeble growth in its earnings per share.

You can view the full analysis from the report here: VALE

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 article's author. 

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