arbitrage
ar·bi·trage / ˈɑrbətrɑʒ ; ˈɑ:bətrɑ:ʒ /noun Utechnical
1. the process of buying something such as raw materials or currency in one place and selling them immediately in another place in order to make a profit from the difference in prices套利，套汇，套购
—arbitrageur / ˌɑrbətrɑˈʒɚ ; ˌɑ:bətrɑ:ˈʒɜ: / also arbitrager BrE/ ˈɑrbəˌtrɑʒə ; ˈɑ:bətrɑ:ʒə / noun C