NEW YORK (TheStreet) -- Century Aluminum(CENX) - Get Report shares are down by 20.99% to $6.49 in morning trading on Friday, following yesterday's release of the company's 2015 second quarter earnings results.

The Chicago IL, based company reported a second quarter net loss of $33.9 million, or an adjusted loss of 25 cents per share on revenue of $523.5 million.

Those results missed analysts' expectations for earnings of 34 cents per share on revenue of $543.9 million.

"In the primary aluminum sector, demand development remains strong in the U.S. and is improving in Western Europe and certain other key developed markets. However, there has been a meaningful deterioration in supply side conditions, principally in the form of exports from China," CEO Michael Bless said in a statement.

Century Aluminum is a holding company engaged in producing primary aluminum as well as operating smelting facilities.

Separately, TheStreet Ratings team rates CENTURY ALUMINUM CO as a Hold with a ratings score of C. TheStreet Ratings Team has this to say about their recommendation:

"We rate CENTURY ALUMINUM CO (CENX) 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 robust revenue growth, compelling growth in net income and notable return on equity. However, as a counter to these strengths, we also find weaknesses including a generally disappointing performance in the stock itself and poor profit margins."

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