The euro fell sharply against the dollar Wednesday after Germany didn't raise as much money as hoped at a bond auction.
The weak demand for German bonds fueled fears that Europe's largest economy could be sucked into the region's growing debt crisis.
"This is the worst-case scenario as it is hard to see how the euro zone can survive if Germany also suffers a liquidity attack like Spain, Italy, Greece etc.," said Kathleen Brooks, a research director at FOREX.com.
Germany said Wednesday that its latest $8.1 billion auction of 10-year bonds was met with only 60 percent demand. It said that weak demand was due to an "extraordinarily nervous" market.
The euro fell to $1.3326 late Wednesday from $1.3509 late Tuesday. The euro fell as low as $1.3318 earlier, its lowest point since Oct. 6.
The dollar was also stronger against most other currencies. The British pound fell to $1.5506 from $1.5628.
The dollar rose to 77.35 Japanese yen from 76.97 Japanese yen, to 0.9207 Swiss franc from 0.9147 Swiss franc and to 1.0485 Canadian dollar from 1.0372 Canadian dollar.