NEW YORK (TheStreet) -- Billionaire investor Carl Icahn now owns about 8.5% of Freeport-McMoRan Inc. (FCX) - Get Report , a stake worth about $900 million.

Icahn bought a large piece of the mining company after it disclosed it will cut staff and decrease spending. The well-known investor is now one of the biggest shareholders of the company.

Now that Icahn bought into Freeport-McMoRan, should you too?

Here is the Freeport-McMoRan's stock recommendation, according to TheStreet RatingsTheStreet's proprietary ratings tool.

TheStreet Ratings projects a stock's total return potential over a 12-month period including both price appreciation and dividends. Based on 32 major data points, TheStreet Ratings uses a quantitative approach to rating over 4,300 stocks to predict return potential for the next year. The model is both objective, using elements such as volatility of past operating revenues, financial strength, and company cash flows, and subjective, including expected equities market returns, future interest rates, implied industry outlook and forecasted company earnings.

Buying an S&P 500 stock that TheStreet Ratings rated a buy yielded a 16.56% return in 2014, beating the S&P 500 Total Return Index by 304 basis points. Buying a Russell 2000 stock that TheStreet Ratings rated a buy yielded a 9.5% return in 2014, beating the Russell 2000 index, including dividends reinvested, by 460 basis points last year.

Check out which stocks made the list. And when you're done, be sure to read about which safe, A+ rated stocks you should buy now. Year-to-date returns are based on August 27, 2015 closing prices.

FCX data by YCharts
Freeport-McMoRan Inc. (FCX) - Get Report
Rating: Sell, D+
Market Cap: $10.6 billion
Year-to-date return: -56.4%

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Freeport-McMoRan Inc., a natural resource company, engages in the acquisition of mineral assets, and oil and natural gas resources. It primarily explores for copper, gold, molybdenum, cobalt, silver, and other metals, as well as oil and gas.

TheStreet Ratings team rates FREEPORT-MCMORAN INC as a Sell with a ratings score of D+. TheStreet Ratings Team has this to say about their recommendation:

"We rate FREEPORT-MCMORAN INC (FCX) a SELL. This is driven by some concerns, which we believe should have a greater impact than any strengths, and could make it more difficult for investors to achieve positive results compared to most of the stocks we cover. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income, generally high debt management risk, disappointing return on equity, weak operating cash flow and generally disappointing historical performance in the stock itself. "

Highlights from the analysis by TheStreet Ratings Team goes as follows:

  • The company, on the basis of change in net income from the same quarter one year ago, has significantly underperformed when compared to that of the S&P 500 and the Metals & Mining industry. The net income has significantly decreased by 484.0% when compared to the same quarter one year ago, falling from $482.00 million to -$1,851.00 million.
  • Currently the debt-to-equity ratio of 1.51 is quite high overall and when compared to the industry average, suggesting that the current management of debt levels should be re-evaluated. To add to this, FCX has a quick ratio of 0.58, this demonstrates the lack of ability of the company to cover short-term liquidity needs.
  • Return on equity has greatly decreased when compared to its ROE from the same quarter one year prior. This is a signal of major weakness within the corporation. Compared to other companies in the Metals & Mining industry and the overall market, FREEPORT-MCMORAN INC's return on equity significantly trails that of both the industry average and the S&P 500.
  • Net operating cash flow has decreased to $1,069.00 million or 22.87% when compared to the same quarter last year. Despite a decrease in cash flow FREEPORT-MCMORAN INC is still fairing well by exceeding its industry average cash flow growth rate of -41.10%.
  • Despite any intermediate fluctuations, we have only bad news to report on this stock's performance over the last year: it has tumbled by 73.75%, worse than the S&P 500's performance. Consistent with the plunge in the stock price, the company's earnings per share are down 486.95% compared to the year-earlier quarter. Naturally, the overall market trend is bound to be a significant factor. However, in one sense, the stock's sharp decline last year is a positive for future investors, making it cheaper (in proportion to its earnings over the past year) than most other stocks in its industry. But due to other concerns, we feel the stock is still not a good buy right now.