The market's worries about Spain's high debt make the euro hit a low week against the US dollar and yen, and sparked the Swiss central bank's actions to limit the rise of the Swiss franc against the euro.

The euro fell for fourth consecutive days against the dollar.

"Spain is not Greece, and its contribution to the gross domestic product (GDP) of the euro area is even greater," said Dan Dorrow, director of Faros Trading research. "The market is now very concerned about the jump in yields."

The euro fell 0.6% to 1.3066 against the dollar, hitting its lowest level since March 15th, while the euro fell 0.7% to 107.61 against the yen and fell to its lowest level since March 8th, 106.89.

Yields on Spanish and Italy bonds continued to rise on Thursday, highlighting the market's concern about Europe's ability to control the regional debt crisis.

Spain's sale of treasury bonds on Wednesday was cold, and yields on treasury bonds soared.

France sold 8 billion 400 million euro bonds early Thursday, and its borrowing costs rose.

In view of the market's anxieties about Spain, this may ease the ECB's easing policy after the European central bank governor Delaki's moderate comments on Wednesday confirmed this.

By contrast, the US Federal Reserve (FED) this week weakened the anticipation of more monetary stimulus.

With the improvement of the US economy,

"The euro zone firewall is not set enough to help Spain," Dorrow said. "If the Federal Reserve is the European Central Bank, they will start quantitative easing or lower interest rates, but the ECB is more passive in decision-making, and I think they are in a more difficult position."

In terms of economic data, the US US Department of Labor announced that the number of Americans who had jobless claims earlier than last week was better than expected.

In the week ending March 31st, the number of unemployed Jin people was 357 thousand, and the average estimate of economists was 360 thousand, compared with 359 thousand in the previous week.

Phil Orlando, chief stock strategist at Federated Investors, said: "the most important economic data today is the number of jobless claims at the beginning of last week, which is not bad.

It is the last piece of data before tomorrow's non-agricultural employment figures are released.

We believe that the job market is still improving and retailers' sales data are also strong.

The US labor department will announce the non farm employment data in March on Friday.