I know very little about currency markets, but this sounds ominous:

Fears of dollar collapse as Saudis take fright

Saudi Arabia has refused to cut interest rates in lockstep with the US Federal Reserve for the first time, signalling that the oil-rich Gulf kingdom is preparing to break the dollar currency peg in a move that risks setting off a stampede out of the dollar across the Middle East.

"This is a very dangerous situation for the dollar," said Hans Redeker, currency chief at BNP Paribas.

"Saudi Arabia has $800bn (£400bn) in their future generation fund, and the entire region has $3,500bn under management. They face an inflationary threat and do not want to import an interest rate policy set for the recessionary conditions in the United States," he said.

The Saudi central bank said today that it would take "appropriate measures" to halt huge capital inflows into the country, but analysts say this policy is unsustainable and will inevitably lead to the collapse of the dollar peg.

As a close ally of the US, Riyadh has so far tried to stick to the peg, but the link is now destabilising its own economy.

The Fed's dramatic half point cut to 4.75pc yesterday has already caused a plunge in the world dollar index to a fifteen year low, touching with weakest level ever against the mighty euro at just under $1.40.

There is now a growing danger that global investors will start to shun the US bond markets. The latest US government data on foreign holdings released this week show a collapse in purchases of US bonds from $97bn to just $19bn in July, with outright net sales of US Treasuries.

A reasoned debate on this would be beneficial. For me, at least.