President Barack Obama on Monday denied a report that he is concerned that the dollar is too strong.

"First of all, don't believe unnamed sources," Obama said. "I didn't say that and I make a practice of not commenting on the daily fluctuations of the dollar or any other currency."

Bloomberg News earlier cited an unnamed French official who said Obama had made the comment to other G7 leaders:

President Barack Obama told fellow Group of Seven leaders that the strong dollar is a problem, according to a French official with knowledge of the talks.

Geopolitical risks including Greece create volatility on financial markets, affecting interest rates and currencies, the official told reporters at the G-7 summit in southern Germany on Monday. In that context, Obama said that the strong dollar posed a problem, according to the official, who asked not to be named because the discussions were private.