Take context from the input text and decide on the accurate relationship between 'Alcoa' and 'aluminium' from the options provided.
Options: industry, legal form, position held, product/material produced

The increase in primary aluminium production at the smelter to 420,000 tonnes per year could bite into markets also supplied by rival Alcoa (NYSE: AA - news ) and other producers struggling with softer revenue caused by weak prices and rising exports from China.
product/material produced