"That is going to have a real big impact on markets, and that will generate increased volatility," said Ian Stannard, European head of FX strategy at Morgan Stanley in London.
Obama stumped as Puerto Rico, Greece debt crises roil global markets →
"This is one hurdle that has been overcome, but it's not the end of the problems for Portugal and the eurozone," said Ian Stannard, an analyst at BNP Paribas. "This auction is not going to make the problems go away."
Portugal clears hurdle with sale of bonds →