generate questions: Both the Shanghai Stock Exchange and the Shenzhen Stock Exchange suspended trading of companies based in southwestern China. Copper rose over speculations that production in southwestern China may be affected, and oil prices dropped over speculations that demand from China would fall.
Where were the exchanges based? {sep_token} What metal rose in value? {sep_token} What natural resource dropped in value? {sep_token} What did the Shanghai Stock Exchange do? {sep_token} Where were companies located that had their stock trading suspended? {sep_token} What metal rose due to speculation? {sep_token} Besides the Shanghai Stock Exchange, what other exchange suspended trading of southwestern China stock?