Bjorn said:
You wrote: If the market switched to a Euro contract then anyone holding only US Dollars (or any one of the many other currencies that exist in the world) would do the same.
And my question is still: Don't you think it would have any impact on the value of the dollar if they all sold dollars at the same time?
Finacial Times and others wrote two days ago:
Reuter had this, three weeks ago:
I can see why that quote (of mine) confuses you. I doesn't make any sense to me now either
Best just to scratch that sentence, with my apologies, and return to the point. The point being that if oil contracts were priced in Euro, there would be very little implication for FX markets - see my simple exmaple above why there would be no net effect on FX demand for US Dollars.
So with that out of the way, I can address your apparent point, which is somewhat different. You are talking about people holding US Dollar assets. This is completely different and separate from the original subject of this thread and my posts.
It is true that if foreign central banks reduced their holdings of US assets then it would likely put some downward pressure on the Dollar by creating excess supply for Dollars. So the Dollar migt depreciate a bit. But that doesn't matter, becasue that is what currencies do. At a later time it would appreciate again.
Take a tip from me. The next time you read an article about how the whole world will dump US Dollar assets, think about who exactly they sell them to. Someone must buy them and if nobody wants them (say US Treasuries) the price will fall. As the price falls the yield on these instruments increases and people stop and think "hey these are pretty good value. Let's buy some." So you would never get everyone dumping US Doillar assets en masse. Furthermore, if there was this "readjustment" official reserves, there could be some effect on FX markets. However these would be swamped by the other sources of supply and demand for FX every day of the week. Any concsequent effect on the currency would be small in comaprison to the normal volatility in the Dollar - note that over the last 30 years it has appreciated and depreciated by more than 20% in a year.
So to summarise:
Oil priced in US Dollars - doesn't matter
Pepole selling US Dollar assets - some effect, but grossly overstated by most (including the FT)
[postscript]
And apply some sceptic ligic to claims that Asian countries will dump US Dollar Reserves in a major way. This would not be a particularly sound thing to do if you had an exchange rate pegged to the US Dollar - as many of these countries do.