Parity of purchasing power - PPA

What is the Parity of the Spending power?

We see the Parity of the Spending power and how it is used in the Forex market.

The Parity of Purchasing Acquisitive (PPA) is the theory that rises that it exists a relation between the rates of change of the different countries and the price in which the goods or services are sold in those countries. The parity of the spending power of Forex also can be expressed as the existence of balance between currencies when its spending power is the same in each country.

The PPA can be seen of clearer way with the following formula:

Rate of change between countries = Price of the goods in country X/Price of the goods in the country and.

The theory of the PPA was developed in 1920 by Gustav Kassel. The parity of the spending power is based on the “law of a price”. This theory expresses that in efficiently identical markets, the identical services or goods must have only a price. The parity of the spending power (PPA) is important for the currency market since it is the factor of conduction behind the currency movement in the Forex market.

The importance of the PPA

The parity of the spending power is used like a method to calculate the differences in the costs of life between the countries.

The rate of normal change can reflect only the marketable goods of the no marketable ones. The normal rates of change of a market can be used to compare the style of standard life between different countries. The technique normal to calculate different standards from life between countries normally involves the use of the technique of the internal Gross Product. The internal gross product is calculated when dividing the GIP of a country, by the population of the same country. Both total then they are expressed in the same currency. Many variables hit on the currency market such as the different interest rates, the speculation of the market, the cover or the control by the central banks. All these are factors that can contribute per capita to an inexact result of method the GIP. To use this technique can produce deceptive results on the standard of life in those countries. Method PPA this way is used to offer one more a more exact figure.

In order to calculate the parity of the spending power between two countries, the price of the goods “standard” that are identical in each country, they must be compared. The samples of a basket of goods and services can include the following thing: goods and services of the consumer, or intermediate (or of equipment), projects of construction and services and services of the government.

Disadvantages:

The short term fluctuations in the prices of the goods and services take to a parity of inexact the spending power. The retailers would have to use the results of the parity of the spending power for a long term analysis that allows a more exact result.

Factors such as differences in the fiscal regulations and commercial restrictions imposed by the different countries influence in the result of the PPA. The rate of change of the parity of the spending power will only be as exact as the election of the goods used in the comparison index.

When choosing the erroneous basket of goods and services, the result can accidentally be misinterpreted. To distinguish between the quality of the goods in a country and the equivalent of the goods in another one will have an effect in the result of the PPA.