Sony said, however, that as its business became more global and the company incurred more of its costs in dollars, currency fluctuations would have less of an effect.
In U.S. dollar currency, the highest returns occurred on Wednesday and then Tuesday.
The climb has been most pronounced in dollars, the currency in which most globally traded commodities are priced, because the dollar itself has weakened.
They also need to process payments in dollars (the currency in which almost all international energy transactions are priced).This gives Europe and America considerable leverage, if they choose to exert it.
The Fed's so-called quantitative easing could cause a decline in the dollar in currency markets, which by making American exports cheaper could eventually erode both Germany's and China's large trade surpluses.
But commodity prices have risen even when priced in non-dollar currencies.
They would normally wish to restore this cut by increasing the dollar price of oil, either arbitrarily or through some system of denominating the oil price in non-dollar currencies.
But the U.S. dollar has a formidable advantage: If countries stopped investing their foreign reserves in dollars, their currencies would appreciate against the dollar and they would suffer capital losses on their large dollar holdings.
"They source their manufacturing in Asia in dollar-related currencies, so their cost of goods is down, and they are selling in Europe in euros and pounds, etc.," he said.
Washington accuses the bank of having engaged in dollar transactions -- a currency commonly used in international trade -- with embargoed countries, including Cuba, between 2002 and 2009.
