The euro
Draghi warned that the surge in the euro was a source of uncertainty and said the ECB might have to review strategy if U.S. comments on the benefits of a weak dollar lead to a change in monetary conditions.
The dollar had slipped against the euro on Wednesday after U.S. Treasury Secretary Steve Mnuchin said he welcomed a weaker greenback.
Some market participants had been expecting Draghi to take a firmer stance addressing the euro's potentially damaging surge against the dollar.
"Overall, the comments regarding the exchange rate were benign," said Eric Viloria, currency strategist at Wells Fargo Securities in New York.
"There was a lack of any forceful comments with respect to the recent euro strength," he said.
The dollar index <.DXY>, which measures the greenback against a basket of six major currencies, was down 0.71 percent at 88.575, after dropping as low as 88.438, its lowest since December 2014.
"Some of this USD sell off is now technical in nature, and the trend following crowd is likely pressing the bet a bit," Brad Bechtel, managing director FX at Jefferies, said in a note.
Wells Fargo's Viloria said that from a technical standpoint the dollar index has scope to move lower.
"It remains within an overall downwards trend," he said.
The greenback had already been on the defensive thanks to trade protectionism worries fanned by U.S. President Donald Trump's decision to impose steep import tariffs on washing machines and solar panels earlier in the week.
With a weaker dollar, the yen
Sterling
Sterling was up 0.42 percent at $1.4301.
The Canadian dollar
(Reporting by Saqib Iqbal Ahmed; Editing by Meredith Mazzilli)
By Saqib Iqbal Ahmed