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Mr. Copper

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Unveiling the Legend of Mr. Copper: The Rise and Fall of Yasuo Hamanaka

Unraveling the Enigma of Mr. Copper

Mr. Copper, better known as Yasuo Hamanaka, ascended to fame in the mid-1980s, leveraging his position as the head of Sumitomo's metal-trading division to dominate the world copper market through aggressive and illicit investment maneuvers.

The Reign of Mr. Five Percent

Hamanaka's audacious strategies propelled Sumitomo to the forefront of the copper trading arena, granting him control over a staggering 5% of the global copper supply. This unprecedented control earned him the moniker "Mr. Five Percent," echoing the legendary status of famed oil trader Calouste Gulbenkian.

The Fall from Grace

However, Hamanaka's meteoric rise was short-lived. His clandestine activities, amounting to $2.6 billion in losses for Sumitomo, led to his conviction on charges of fraud and forgery, resulting in a seven-year prison sentence. Despite Sumitomo's denial of complicity, the company paid a hefty $150 million settlement to regulators.

Unveiling the Machinations

Hamanaka's manipulation of the copper market was facilitated by Sumitomo's substantial futures contracts, coupled with their physical copper holdings. This dominance allowed him to dictate copper prices worldwide, thwarting attempts by investors to short the commodity and reaping significant profits for Sumitomo through transaction commissions.

Regulatory Reckoning

In the aftermath of Hamanaka's exploits, regulatory reforms instituted by the London Metal Exchange have curtailed the possibility of future market cornering endeavors, safeguarding against similar episodes of manipulation.