A central concept of macroeconomics is purchasing power parity. It describes how price levels can be compared between countries and why exchange rates cannot diverge arbitrarily in the long term without creating imbalances. The topic is particularly relevant for investors when they invest in foreign shares, bonds or funds. It can also be used to better assess the economic development of different countries. We explain what purchasing power parity means, how it is calculated and its practical applications and limitations.<\/p>\n\n\n\n
Purchasing power parity (PPP for short) is an economic concept that describes the Relationship between prices and exchange rates<\/strong> explained. It describes the relationship between two currencies in which an identical basket of goods has the same price in both countries. The concept is based on the assumption that identical goods should cost the same everywhere on free markets. If this is not the case, one currency is considered to be over- or undervalued compared to the other.<\/p>\n\n\n\n Example: <\/p>\n\n\n\n If an identical product costs 100 US dollars in the USA and 90 euros in Germany, the exchange rate should be 1 US dollar = 0.90 euros in the long term. If the actual exchange rate deviates from this, this is referred to as a deviation from purchasing power parity.<\/p>\n\n\n\n A distinction is made between two variants:<\/p>\n\n\n\n Purchasing power parity thus provides a fair value for currencies and therefore a basis to make global prices and economic strength comparable<\/strong>. In practice, however, different market conditions, taxes and regulatory frameworks mean that actual prices can differ significantly. Nevertheless, PPP remains a helpful concept for better understanding exchange rates in the long term.<\/p>\n\n\n\n Purchasing power parity is determined by looking at a defined basket of goods (e.g. food, services, energy) in different countries. You compare how much this basket of goods costs in the local currency and compare the prices. The actual calculation of purchasing power parity (PPP) then depends on whether the absolute or relative variant is considered.<\/p>\n\n\n\n Absolute purchasing power parity:<\/strong><\/p>\n\n\n\n The absolute PPP directly compares the prices of an identical basket of goods in two countries. <\/p>\n\n\n\n The formula is (prices converted into the same currency):<\/p>\n\n\n\n PPP =Price in GermanyPrice abroad<\/p>\n\n\n\n Example:<\/p>\n\n\n\n A product costs 90 euros in Germany and 100 US dollars in the USA. The exchange rate at purchasing power parity would be:<\/p>\n\n\n\n KKP =90100=0.90<\/p>\n\n\n\n This means: 1 US dollar should theoretically be worth 0.90 euros. If the real exchange rate is above or below this, one of the two currencies is over- or undervalued.<\/p>\n\n\n\n Relative purchasing power parity<\/strong><\/p>\n\n\n\n In contrast to the absolute PPP, the relative purchasing power parity does not compare the current price level, but the change in price levels over time (i.e. inflation rates). It indicates how the exchange rate of two countries should develop in the long term if one country has higher inflation.<\/p>\n\n\n\n The formula for this is:<\/p>\n\n\n\n WeWt=1+iDomestic1+iForeign<\/p>\n\n\n\n Here, We is the expected future exchange rate, Wt is the current exchange rate and i is the respective inflation rate at home and abroad. If one country has higher inflation than the other, its currency will lose value in relation to the foreign currency.<\/p>\n\n\n\n Example:<\/p>\n\n\n\n If Germany has an inflation rate of 2% and the USA 3%, the euro should appreciate against the dollar, as the purchasing power of the US dollar is falling faster. At the current exchange rate of 0.85 euros per US dollar, this means<\/p>\n\n\n\n We=0,85\u22c51+0,021+0,03=0,84<\/p>\n\n\n\n This means that in future you should only have to pay 0.84 euros for 1 US dollar.<\/p>\n\n\n\n Purchasing power parity is not only used to evaluate exchange rates, but is also an important tool in international economic statistics:<\/p>\n\n\n\n Even if it does not serve as a direct investment instrument, purchasing power parity provides valuable information:<\/p>\n\n\n\n Like most theoretical financial concepts, purchasing power parity also has weaknesses. It provides long-term guidance, but not precise short-term forecasts. Anyone using it should be aware of its limitations:<\/p>\n\n\n\n It is also important to note that PPP is more of a Longer-term reference value<\/strong> is. Short-term factors such as interest rate changes, political events, speculation and capital flows follow other mechanisms. PPP is therefore a particularly helpful tool for medium to long-term perspectives.<\/p>\n\n\n\n Purchasing power parity is a Central concept for the valuation of currencies<\/strong> and to classify international price differences. It helps to estimate the fair value of currencies, recognize long-term trends and Price levels comparable across national borders<\/strong> to make. For investors, it provides guidance when analyzing exchange rates, selecting international investments and making long-term comparisons of economic indicators.<\/p>\n\n\n\n It is no substitute for a comprehensive analysis, but it can serve as a stable parameter in an otherwise volatile world. Short-term exchange rate movements depend on many other factors. Anyone using PPP as a guide should always interpret it in context and with an eye to its limitations. Not every price difference automatically means market inefficiency, but those who know the theory often understand global correlations better.<\/p>","protected":false},"author":20,"featured_media":0,"template":"","class_list":["post-63187","glossar","type-glossar","status-publish","hentry"],"acf":{"blog_summary":"","blog_faq_schalter":"nein","faq_uberschrift":"","blog_faq_loop":null},"_links":{"self":[{"href":"https:\/\/www.captrader.com\/en\/wp-json\/wp\/v2\/glossar\/63187","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.captrader.com\/en\/wp-json\/wp\/v2\/glossar"}],"about":[{"href":"https:\/\/www.captrader.com\/en\/wp-json\/wp\/v2\/types\/glossar"}],"author":[{"embeddable":true,"href":"https:\/\/www.captrader.com\/en\/wp-json\/wp\/v2\/users\/20"}],"wp:attachment":[{"href":"https:\/\/www.captrader.com\/en\/wp-json\/wp\/v2\/media?parent=63187"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n
How is purchasing power parity calculated?<\/h2>\n\n\n\n
Areas of application of purchasing power parity<\/h2>\n\n\n\n
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PPP is often used as a benchmark to assess whether a currency is overvalued or undervalued. Central banks, analysts and international organizations use it to identify macroeconomic imbalances. Private investors can also benefit from this approach, for example when investing abroad or assessing long-term exchange rate developments.<\/li>\n\n\n\n
Organizations such as the World Bank or the OECD use PPP-based exchange rates to make the gross domestic product (GDP) of different countries comparable. Instead of relying on nominal exchange rates, which can fluctuate greatly, the PPP provides a more stable benchmark. Economic rankings such as GDP per capita are often presented adjusted for purchasing power in order to show realistic differences in living standards.<\/li>\n\n\n\n
PPP is often used to compare prices and costs of goods and services between countries. Examples include the Economist's calculation of the \u201eBig Mac Index\u201c, which shows how expensive the same product is in different countries. Companies can use purchasing power parity to plan their pricing or market strategy abroad.<\/li>\n\n\n\n
PPP is used in international projects or the distribution of funds by development banks to better capture real costs and enable fair comparisons, for example when planning infrastructure measures or comparing the cost of living.<\/li>\n<\/ol>\n\n\n\nWhy is KKP relevant for investors?<\/h2>\n\n\n\n
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Limits of purchasing power parity<\/h2>\n\n\n\n
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PPP is based on the comparison of tradable goods (e.g. electronics or clothing), but often ignores non-tradable goods such as rents, services or infrastructure. However, these make up a significant proportion of the cost of living and influence real purchasing power.<\/li>\n\n\n\n
Exchange rates are determined not only by commodity prices, but also by Interest<\/a>, capital flows, speculation or geopolitical events. Purchasing power parity cannot reflect these factors, which is why real exchange rates often deviate from it permanently.<\/li>\n\n\n\n
In many countries, there are subsidized prices, tax differences or regulated markets that persist in the long term. Cultural consumer habits can also lead to price deviations, regardless of the fair value according to KKP.<\/li>\n\n\n\n
The calculation of PPPs is often based on baskets of goods. These vary greatly depending on the source, which can lead to different results. In addition, the collection of price data can be difficult or distorted in some countries.<\/li>\n<\/ol>\n\n\n\nConclusion<\/h2>\n\n\n\n