Currency movements - Question

Hi guys,

to what extent is one exchange rate able to influence another? For example - very loosely - how would an appreciation of the USD relative to one currency (say, USD/AUD) affect a completely separate rate such as USD/EUR rate - if anything? And does an appreciation of the USD also affect non-related rates such as EUR/JPY or AUD/NZD etc? I use the USD here as an example but am more curious about the big picture idea.

Thanks heaps.

4 Comments
 

That's not necessarily true. Recently, when markets are avoiding risk, in general the Dollar would rally against most currencies, but fall against the Yen. A lot of it has to do with risk-tolerance, the carry trade (interest rates), volatility, economic conditions, etc. There is no hard and fast rule.

The only certain relationship is between 3 currency pairs like so:

EUR/USD, USD/JPY, EUR/JPY

Because you can synthetically create all the pairs, ie form EUR/JPY by Long EUR/USD, Long USD/JPY.

Jack: They’re all former investment bankers who were laid off from that economic crisis that Nancy Pelosi caused. They have zero real world skills, but God they work hard. -30 Rock
 

In theory exchange rates are going to be determined by a combination of purchasing power parity, covered interest rate parity and speculative demand. But to actually see the effect you are asking about you should look at the EER (effective exchange rate) which looks at a weighted average exchange rate for a country using a basket of other currencies. That shows you if it is moving up or down relative to all other currencies.

 

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