Question: In which city was this global energy and commodity trading company larger than Trafigura as an oil trader formed?
Related documents: [0]  [DOC] Trafigura Pte Ltd is a Singaporean multinational commodity trading company founded in 1993 that trades in base metals and energy, including oil. It is the world's second largest private oil trader after Vitol and the world's largest private metals trader. [END] 
[1]  [DOC] The Vitol Group is a global energy and commodity trading company that was founded in Rotterdam in 1966 by Henk Viëtor and Jacques Detiger. Though physical trading, logistics and distribution are at the core of the business, [END] 
Answer: 
Rotterdam
Rotterdam