Earlier in the day, Chilean copper producer Codelco and miner Southern Copper (NYSE: SCCO - news ) saw some spread tightening, with their 2044s and 2042s quoted at 245bp and 370bp, respectively.
Take context from the input text and decide on the accurate relationship between 'Codelco' and 'copper' from the options provided.
Options: developer, position held, product/material produced, director/manager