NEW YORK (TheStreet) -- Shares of Tronox (TROX) - Get Report are jumping by 21.5% to $3.90 on heavy trading volume late Wednesday afternoon, after the company posted its 2015 fourth quarter results.

After yesterday's closing bell, the chemical company reported an adjusted net loss of 66 cents per diluted share, which was wider than the loss of 44 cents per share analysts' were expecting.

Revenue for the period was $535 million, lower than Wall Street's estimate of $563.2 million.

For the year, Tronox said its loss narrowed to $318 million. Last year during the same quarter, the company reported a loss of $427 million.

"This performance is particularly noteworthy, in our view, because it was accomplished despite the headwind of continued selling price declines in pigment products. TiO2 market conditions remained challenging in the fourth quarter," Chairman and CEO Tom Casey said in a statement.

The Stamford, CT-based company is engaged in the in the mining, production and marketing of inorganic minerals and chemicals. The company operates two vertically integrated businesses: titanium dioxide (TiO2) and alkali chemicals.

About 2.55 million of the company's shares were traded by this afternoon versus its average volume of 1.07 million shares per day.

Separately, TheStreet Ratings Team has a "sell" rating with a score of D on the stock.

This is driven by some concerns, which 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 covered.

The company's weaknesses can be seen in multiple areas, such as its disappointing return on equity, poor profit margins, weak operating cash flow, generally disappointing historical performance in the stock itself and generally high debt management risk.

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

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