How does the currency between countries relate
Firstly currency prices, like any asset, depend on supply and demand. Meaning how many people want to exchange a currency to another one vs. wanting to buy that currency using another currency. Secondly, it really depends on which country and economy you are talking about. In emerging economies, currencies are very often influenced by the politics of that country. In cases like the US, there are a myriad reasons. The USD is mostly governed by psychology (flight to safety) and asset purchases/sales. In theory, currencies balance, given the inflation of a country and its trade with other countries. e.g. Germany, which was always exporting more than it was importing, had the problem of a rising currency. (Which would make its exports more expensive on foreign markets. This is the balancing act.) It's called correlation. I found this: http://www.forexrazor.com/en-us/school/tabid/426/ID/437424/currency-pair-correlations it looks a good place to start Similar types of political economies will correlate together, opposite types won't. Also there are geographic correlations (climate, language etc)
"Wikipedia has a nice list of currencies that use ""cents"" and currencies that use 1/100th division that is not called ""cent"". Cent means ""100"" in Latin (and French, and probably all the Roman family of languages), so if the currency is divided by 100 subunits - it will likely to be called ""cent"" or something similar in the local language. The list of currencies (on the same page) where it is not the case is significantly shorter, and includes countries with relatively ancient currency units that were invented before the introduction of the decimal system (even though now they are in fact decimal they still kept the old names, like the British ""pence"" or the Russian ""kopek""). The point is that ""Dollar"" and ""cent"" are not directly related, many currencies that are not called ""Dollar"" are using cents as well (Euro, among others). It just means ""1/100th"", and it is safe to assume that most (if not all) of the modern currencies are divided into 1/100th." I've been short the Euro for several months now against the USD (could be various others as well). I got in at 1.42, sold on a bounce up to 1.36, bought back at 1.38 and now will probably ride it out lower.   Regardless of whether or not the Eurozone breaks up, I see it breaking through the 1.30 mark in the near-term. After that, I'm not sure how low it goes, but there is certainly potential for it to head towards 1/1. In order to reduce the burden, the ECB needs to devalue the currency.   Although Germany really doesn't want this due to their anti-inflationary ideology, if Italy comes crashing down, so does France. When France goes, Germany goes into a deep recession if not a depression. They have to devalue some.  As for a collapse, I have no idea. It probably depends on how many (if any) countries retain the currency and who they are. "Why does the value of gold go up when gold itself doesn't produce anything? Why do people invest in gold? Your perception, that the value of gold goes up in the long run, is based on the price of gold measured in your favorite paper currency, for example the US Dollar. An increasing price of gold means that in the visible gold market, market participants are willing to exchange more paper currency units for the same amount of gold. There are many possible reasons for this: While HFT became extremely important for the short term price movements, I will continue with long term effects, excluding HFT. So when - as a simple thought experiment - the amount of available paper currency units (US $ or whatever) doubles, and the amount of goods and services in an economy stay the same, you can expect that the price of everything in this economy will double, including gold. You might perceive that the value of gold doubled. It did not. It stayed the same. The number of printed dollars doubled. The value of gold is still the same, its price doubled. Does the amount of paper currency units grow over time? Yes: https://research.stlouisfed.org/fred2/series/BASE/ In this answer my term ""paper currency units"" includes dollars that exist only as digits in bank accounts and ""printing currency"" includes creating those digits in bank accounts out of thin air. So the first answer: gold holds its value while the value of paper currency units shrinks over time. So gold enables you to pass wealth to the next generation (while hiding it from your government). That gold does not produce anything is not entirely true. For those of us mortals who have only a few ounces, it is true. But those who have tons can lease it out and earn interest.  (in practice it is leased out multiple times, so multiple that gain. You might call this fraud, and rightfully so. But we are talking about tons of gold. Nobody who controls tons of physical gold goes to jail yet).  Let's talk about Fear. You see, the perceived value of gold increases as more paper currency is printed.  And markets price in expected future developments. So the value of gold rises, if a sufficient number of wealthy people fear the the government(s) will print too much paper currency.  Second Answer: So the price of gold not only reflects the amount of paper currency, it is also a measurement of distrust in government(s). Now you might say something is wrong with my argument. The chart mentioned above shows that we have now (mid 2015) 5 times as much printed currency units than we had 2008.  So the price of gold should be 5 times as high as 2008, assuming the amount of distrust in governments stayed the same. There must be more effects (or I might be completely wrong. You decide). But here is one more effect: As the price of gold is a measurement of distrust in governments (and especially the US government since the US Dollar is perceived as the reserve currency), the US government and associated organizations are extremely interested in low gold prices to prove trust. So people familiar with the topic believe that the price of gold (and silver) is massively manipulated to the downside using high frequency trading and shorts in the futures markets by US government and wall street banks to disprove distrust. And wall street banks gain huge amounts of paper currency units by manipulating the price, mostly to the downside. Others say that countries like china and russia are also interested in low gold prices because they want to buy as much physical gold as possible. Knowing of the value that is not reflected by the price at the moment. Is there one more source of distrust in governments? Yes. Since 1971, all paper currencies are debt.  They receive their value by the trust that those with debt are willing and able to pay back their debt. If this trust is lost, the downward manipulation (if you think that such a thing exists) of the gold and silver prices in the futures markets might fail some day. If this is the case (some say when this is the case). you might see movements in gold and silver prices that bring them back to equilibrium with the amount of printed paper currencies. In times of the roman empire you got a good toga and a pair of handmade shoes for an ounce of gold. In our days, you get a nice suite and a good pair of shoes for an ounce of gold. In the mean time, the value of each paper currency in the history of each country went to zero and the US $ lost 98% of its initial value. As long as there is not enough distrust, more paper currency is made in equity markets and bond markets on average. (Be aware that you earn that currency only after you were able to sell at this price, not while you hold it) Gerd" Absolutely.  It does highly depend on your country, as US brokerages are stricter with or even closed to residents of countries that produce drugs, launder money, finance terror, have traditional difficulty with the US, etc. It also depends on your country's laws.  Some countries have currency controls, restrictions on buying foreign/US securities, etc. That said, some brokerages have offices world-wide, so there might be one near you.  If your legal situation as described above is fortunate, some brokers will simply allow you to setup online using a procedure not too different from US residents: provide identification, sign tons of documents.  You'll have to have a method to deliver your documentation in the ways you'd expect: mail, fax, email. E*Trade is the best starter broker, right now, imo.  Just see how far you can go in the sign-up process. When economies are strong, it is particularly alluring to have a single currency as it makes trade and tourism simpler and helps reduce costs. The problem comes when individual member economies get into trouble. Because the Eurozone is a loose grouping of nations, there is no direct equivalent of the US Federal government to coordinate a response, there is instead an odd mixture of National and Central government that makes it harder to get a unified approach to the economy (OK, it's maybe not so different to the US in reality).  This lack of flexibility means that some of the key levers of international finance are compromised, for example a weak economy can't float its currency to improve exports. Similarly individual country's interest rates can't be adjusted to balance spending. I suspect the main reason though is political and based on concepts of sovereignty and national pride. The UK does the majority of its trade with the Eurozone, so the pros would possibly outweigh the cons, but the UK as a whole (and some of our papers in particular) have always regarded Europe with suspicion. Most Brits only speak English and find France and Germany a strange and obtuse place. The (almost) common language makes it easier to relate to the US and Canada than our near neighbours. It seems the perception amongst the political establishment is that any attempt to join the Euro is political suicide, while that is the case it is unlikely to happen. Purely from a personal perspective, I'd welcome the Euro except it means a lot of the products I routinely buy would become a lot more expensive if price is 'harmonised'. For an example compare the price of the iPod Touch in the UK (£209.99) to France(€299). The French pay £262 at the current exchange rate, which is close to 25% more. Ouch. See also my question about Canada adopting the US Dollar "I still don't understand this ""analysis.""  Even when the US became the world's largest economy in 1880, the British Pound remained the reserve currency of choice until the 1950s, some seventy years later!  Investors prefer stability and property rights and the US has both, especially when considering the alternatives, i.e. Euro tax takings on bank deposits in Cyprus.    What about the yuan? China may have recently surpassed US economic power, but it is very likely in the midst of a massive credit bubble. China has also been fudging some of their numbers and in many cases, chooses not to keep economic records at all. The fact that many Chinese elites themselves are buying property in Vancouver and the US as a safe harbor also does not bode well for their systemic problems IMO. I'm sticking with the dollar for now." "Wikipedia talks about the Chinese currency: Scholarly studies suggest that the yuan is undervalued on the basis of purchasing power parity analysis. so despite it appearing cheaper due to the official exchange rate, the price in China might actually be fair. There are also restrictions on foreign exchange (purportedly ""to prevent inflows of hot money""), which, in concert with any other legal obstacles to owning or trading on the Chinese exchange, may also explain why the high-frequency traders aren't tripping over each other to arbitrage away the difference." The measure of change of value of a currency in relation to itself is inflation (or deflation).