Quanex Building Products (NYSE:NX): Quanex Building Products trades down after its FQ4 misses estimates on higher material costs and weak sales in its aluminum-sheet unit. The company adds that it still faces a soft market going into 2012 due to stagnant home-construction activity and a difficult economic environment, which, in turn, could pose a risk to current guidance.

The shares closed at $16.20, up $0.86, or 5.61%, on the day. Its market capitalization is $596.28 million.

Monsanto Company (NYSE:MON): A shortage of corn seed, production of which may have fallen 25%-50%, could hamper the 2012 planting season and bring a second year of volatility to corn prices. However, Monsanto, Pioneer Hi-Bred (NYSE:DD) and other large seed companies remain sanguine about supplies.

The shares closed at $76.68, up $4.01, or 5.52%, on the day. Its market capitalization is $41.05 billion.

Owens Corning (NYSE:OC): Owens Corning (NYSE:OC): Q3 EPS of $0.90 beats Wall Street analyst expectations by $0.13. Revenue of $1.5B beats by $0.10B.

The shares closed at $31.26, up $1.2, or 3.99%, on the day. Its market capitalization is $3.78 billion.

Rogers Corporation (NYSE:ROG): Rogers opens -9.3% after it cuts its Q4 guidance for adjusted EPS to $0.22-$0.32 from $0.43-$0.53 previously, due to continued slowing in demand in the wireless infrastructure market. However, Rogers, which provides specialty materials for the industry, expects orders to return in H1 2012.

The shares closed at $33.66, down $2.42, or 6.71%, on the day. Its market capitalization is $544.98 million.

RPM International Inc. (NYSE:RPM): RPM International trades lower after Oppenheimer cut the shares to underperform, citing several challenges, including soft U.S. and European construction markets, and weak pricing power.

The shares closed at $23.53, down $1.5, or 5.99%, on the day. Its market capitalization is $3.08 billion.

China Natural Resources (NASDAQ:CHNR): No-volume metal and coal miner China Natural Resources pounded on what looks like a big block sale this morning – and maybe it’s just unlucky having “China” in its name these days.

The shares closed at $7.19, down $0.35, or 4.64%, on the day. Its market capitalization is $151.88 million.

Alumina Limited (NYSE:AWC): Shares of Alumina Limited fell after industry sources say China may keep imports of raw material alumina capped as domestic production increases.

The shares closed at $4.65, down $0.2, or 4.12%, on the day. Its market capitalization is $2.84 billion.

Spartech Corporation (NYSE:SEH): Spartech soars after its FQ3 beat estimates as the packaging company was able to offset a decline in volume by raising prices and selling a higher-priced mix of products. The company raises the lower end of its FY12 EPS estimates, now seeing $0.18 to $0.20 per share.

The shares closed at $4.74, down $0.16, or 3.27%, on the day. Its market capitalization is $146.14 million.

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