Yesterday, the Forex Blog published a commentary piece exploring the rally in the Dollar that is currently under way. While the rally is strongly grounded in fundamentals (falling commodity prices, the spread of the credit crisis to the rest of the world), some traders are nonetheless crying foul. They claim that the European Central Bank (with or without the assistance of the US) furtively intervened in forex markets to the tune of 10 Billion Euros. Even if their claim is true, it is unlikely to have meaningfully contributed to the Dollar rally, since the amount in question is quite small. Central Bank intervention would require an expenditure of at least $100 Billion to be even partially successful. Japan, for example, has spent nearly $1 Trillion (if its foreign exchange reserves are any indication) holding down the Yen over the last decade. Besides, the Dollar rally is unsurprising, given certain recent economic developments and the benefit of hindsight. Minyanville.com reports:

Whenever global liquidity tightens relatively speaking, it is very US$ supportive. Obviously, there are always time lags between economic events until the the market perceives them. So as a result of weak demand in the US, lower imports, the demand for oil declines, and that led to a tightening of global liquidity which led to the strong dollar

Read More: Currency Intervention and Other Conspiracies