Jamie Dimon, the new golden boy of US banking, is sitting on a paper profit of just under $200m (€156m) after last week's $58bn acquisition of Bank One by JP Morgan Chase, according to official filings. Bank One's chairman is also set to make a great deal more from a bulletproof five-year contract.

Dimon, 47, and his wife Judy own $127m in Bank One stock between them, based on the share offer price of $51.77, according to filings with the Securities and Exchange Commission. Dimon has a further 3.7 million options over Bank One stock, according to filings and sources close to the company.