Speaking in the present tense, SNB president Roth says the strong franc is the main problem. Not WAS the main problem at 1.48, but IS the main problem at 1.53.

He says it is important the franc not rise further.

Deflation is his main worry, he says.

UPDATE: More from Roth: Currency sales are the strongest method of quantitative easing and fighting inflation.

Earlier today, the BIS was a seller above 1.5300; they were above 1.54 yesterday.