As such, the Spanish dollar was worth slightly more than the U.S. dollar, and likewise, the Newfoundland dollar, until 1895, was worth slightly more than the Canadian colonial dollar.

Subsequently the dollar did decline.

And that means further depreciation of the dollar.

The value of the US dollar is estimated at IRR 10,500 for the same period.

China interprets quantitative easing as a plot to devalue the dollar and force a revaluation of the renminbi.

When they cease their large scale dollar purchase programs, the value of the dollar will fall and it will fall hard.

While the renminbi has risen relative to the dollar, the dollar has declined against other major currencies.

First, it contributes to yen depreciation and dollar appreciation as carry traders switch out of yen.

The relationship between the value of the dollar and oil prices is very complex.

So far, however, the RMB s appreciation against the dollar has been slow.

The dollar is already down 25 over the past five years, and if the US tips into recession a 50 50 chance right now the dollar is going to drop a lot more.

In falling, the dollar lowers the value of the dollar securities in foreign portfolios when valued in euros or other home currencies, shrinking the share of dollars in investors portfolios.

Since early 2002, the dollar has fallen by one third against major currencies, and recently this decline has intensified.

Yet the dollar, a symbol of American financial power, has surged rather than declined.

The recent appreciation of the dollar adds to their hardship.

Nor is the Fed specifically aiming to lower the dollar s value.

On January 1, 2008, the franc was valued at 1,129.40 per US dollar.

Dollar depreciation improves Europe s terms of trade and real income.

Any change in the value of the dollar therefore affects their cost structure and profitability.

The coincidence of the dollar decline and the rise in the oil price suggests to many observers that the dollar s decline caused the rise in the price of oil.

The dollar is declining because only a more competitive dollar can shrink the US trade deficit to a sustainable level.

But if international currency speculators get the scent of near inevitable profits from an ongoing dollar decline in their nostrils, all Asian central banks together will not be able to keep the dollar high.

A sharp weakening of the euro towards parity with the US dollar, which is unlikely, as the US is weak, too.

In the face of the dollar s ongoing fall, policymakers have seemed paralyzed.

And the value of gold does not increase in dollars to offset the fall in the value of the dollar relative to the euro or the yen.

The outcome was a sudden fall in the value of the dollar, which depreciated by 50 against the Deutschemark.

Eurozone financial markets have stabilized, and the euro has appreciated against the dollar and the yen.

Put differently, the value of the dollar reflects total national saving, not just savings in the household sector.

As the dollar declines, commodities including oil attract investors.

During the same period, the dollar fell by 15 relative to the euro and 12 against the yen.

The yen s value against the US dollar has declined by more than 7 in the last month.

With the euro rising relative to the dollar, the yen s fall relative to the euro has been even greater.

The 20 revaluation of the renminbi against the US dollar in 2005 2008 undoubtedly facilitated this in the case of recipient countries whose currencies did not also appreciate against the dollar.

The yen s value against the US dollar has declined by more than 7 in the last month. With the euro rising relative to the dollar, the yen s fall relative to the euro has been even greater.

In one, the value of the dollar will be low in the other, the US will be in a depression.

At that price, the dollar was undervalued by roughly 10 relative to its purchasing power parity (PPP).

Simply put, there must be dollar depreciation to keep global imbalances in check.

In fact, Brazilians purchasing power could shrink further, owing to the depreciation of the real against the dollar.

A 20 dollar depreciation would therefore reduce Americans purchasing power by only 3 .

One of the problems that had made the crisis more difficult after 1982 was the US dollar s appreciation.

The weaker dollar also reduces the risk of future dollar decline, because it means that the dollar has to fall less in the future to shift the trade balance to a sustainable level.

The financial sector was able to profit from the rising dollar, and a depreciation would have run counter to Ronald Reagan's administration's plans for bringing down inflation.

If there is a sharp spike in interest rates caused either by capital flight in anticipation of a dollar decline or by tight monetary policy in reaction to a dollar decline comes to pass we will see how good the Federal Reserve really is.

Such is the supposedly airtight case for a stronger dollar. How might it spring a leak?

In the past 12 months, the renminbi strengthened by 6 against the dollar, its reference currency.