NEW YORK (TheStreet) -- Shares of Century Aluminum  (CENX) - Get Report fell 6.01% to $13.44 in morning trading Tuesday after Morgan Stanley downgraded the stock to "underweight" from "equal weight" and trimmed its price target to $12 from $18.

This price target suggests a potential downside of 16.08% from the stock's close of $14.30 on Monday.

This marks the second downgrade of Century Aluminum by Morgan Stanley this month. On Thursday, March 5, the firm downgraded the company to "equal weight" from "overweight" and slashed its price target to $18 from $29.

Century Aluminum is a primary aluminum producer that supplies standard-grade, high-purity, and value-added primary aluminum products at a rated production capacity of 1.03 million metric tons per year (mtpy).

More than 1.4 million shares had changed hands as of 10:50 a.m., compared to the daily average volume of 1,567,610.

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

"We rate CENTURY ALUMINUM CO (CENX) a BUY. This is driven by a number of strengths, which we believe should have a greater impact than any weaknesses, and should give investors a better performance opportunity than most stocks we cover. The company's strengths can be seen in multiple areas, such as its robust revenue growth, increase in stock price during the past year, impressive record of earnings per share growth, compelling growth in net income and good cash flow from operations. We feel these strengths outweigh the fact that the company shows low profit margins."

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

• The revenue growth greatly exceeded the industry average of 18.7%. Since the same quarter one year prior, revenues rose by 37.4%. Growth in the company's revenue appears to have helped boost the earnings per share.
• Compared to where it was a year ago today, the stock is now trading at a higher level, reflecting both the market's overall trend during that period and the fact that the company's earnings growth has been robust. Turning our attention to the future direction of the stock, it goes without saying that even the best stocks can fall in an overall down market. However, in any other environment, this stock still has good upside potential despite the fact that it has already risen in the past year.
• CENTURY ALUMINUM CO reported significant earnings per share improvement in the most recent quarter compared to the same quarter a year ago. The company has demonstrated a pattern of positive earnings per share growth over the past two years. We feel that this trend should continue. During the past fiscal year, CENTURY ALUMINUM CO turned its bottom line around by earning $1.13 versus -$0.46 in the prior year. This year, the market expects an improvement in earnings ($2.00 versus $1.13).
• The net income growth from the same quarter one year ago has significantly exceeded that of the S&P 500 and the Metals & Mining industry. The net income increased by 739.3% when compared to the same quarter one year prior, rising from -$9.68 million to $61.85 million.
• Net operating cash flow has significantly increased by 534.02% to $98.70 million when compared to the same quarter last year. In addition, CENTURY ALUMINUM CO has also vastly surpassed the industry average cash flow growth rate of -45.34%.
• You can view the full analysis from the report here: CENX Ratings Report