A staff member counts money at a branch of Industrial and Commercial Bank of China on August 10, 2011 in China.

Demand for dollar cash outside the United States surged on Tuesday, with market participants paying sharply higher premiums to get their hands on dollars to tide them over a mid-October deadline to raise the U.S. borrowing limit.

Banks and investors around the world always have a need for dollar liquidity, but do not have direct access to the lending windows run by the Federal Reserve which guarantee U.S. banks easy access to cash.