Mr. Copper

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Mr. Copper

Otherwise known as Yasuo Hamanaka, Mr. Copper was a trader in the copper market who lost over $2.5 Billion for his employer, Sumitomo Corp. (in Japan). The losses amassed from unauthorized trading in secret accounts between 1985 and 1996.

Notes:

He was also referred to as "Mr. 5 Percent," because at one point he controlled 5% of the world copper market. Hamanaka's scandalous activities rank first for the greatest unauthorized trading loss in history.

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