Joe Weisenthal at Business Insider raises the possibility that Bernanke is being strategic here: even if he is more optimistic than he makes out in the speech, he still wants to signal that the Fed is not about to take its foot off the gas.

FORBES: Bernanke: Still Cautious on the Economy

The signal from this speech is that Bernanke will retain an accommodative position.

FORBES: Bernanke: Still Cautious on the Economy

Economists viewed his speech as a signal that the ECB would resume its bond-buying program.

FORBES: Drugged By Draghi: Markets Rally After ECB Chief Promises To Save Euro

As King works up to the mighty peroration of the greatest American speech of the 20th century, his cadences continue to rise and fall, going higher each time to signal his passion for the subject.

FORBES: The Story Behind Martin Luther King's 'I Have a Dream'

However much Mr Blair insists that his speech this week signalled no change in policy, it was the signal for the Tory Europhiles to break cover.

ECONOMIST: Britain and the euro

The recent sharp appreciation of the single currency did not "signal a serious overvaluation", Jens Weidmann argued in a speech that came at a time of rising fears the eurozone stands to lose most in a global currency war.

CNN: US Treasury triggers fall in yen