[QUOTE=“PipNRoll;674542”]
I am not familiar with PPP but here is what I have read online and how I understand it.
Purchasing Power Parity or PPP is an economic theory that implies that the international currency rates should be balanced according to the relative cost of goods and services in the given countries. For example, if the basket of goods costs $1,000 in country X and the same basket of goods costs $2,000 in country Y then the PPP relation is 1:2, which means that the currency of country X should appreciate by 100% relatively to the currency of country Y. Ideally if their current exchange rate (X/Y) is 1:2, it should become 2:2
Knowing the GDP (PPP) for each currency pair such as EUR/USD it will help to determine if the currency is overvalued or undervalued. PPP can be used as an indicator and as a main currency rate forecast. Although, it is not perfect and it has a lot of flaws in calculation and its interpretation along with many factors that will influence the currency pairs to shift the trend in short-term trading opportunities such as supply and demand, interest rates, political stability, etc. Despite of this, PPP can be used as part of a long-term fundamental indicators to predict the future currency rates in 1-2 or more years.[/QUOTE]
Yep! So that’s what PPP is… Essentially it can be thought of as the PRACTICAL exchange rate for each country. If the real exchange rate skews too far from what the PPP is, then import and export companies can and actually do begin arbitraging the discrepancy and in doing so will actually drive the exchange rate back to the PPP value.
When the real exchange rate differs from the PPP implied exchange rate by a significant margin, it can offer a big opportunity for a trade in the direction to close the gap in between the two.
A perfect example of this is the audusd. The PPP implied exchange rate for these two currencies back six months ago was around 0.7500 while the real exchange rate was around 0.9000. That is a pretty significant difference, and since then the exchange rate has dropped around a thousand pips as the exchange rate converges with the suggested PPP value.
Its important to note that the real exchange rate can sustain a significant difference to the PPP value for a long time as other market forces take the driver seat. In the case of the Australian dollar, the mining boom over there and the surge in commodity prices over the last decade has supported their dollar to a level “above its fundamental value” according to Australia’s central bank. Now with the mining boom fading and commodity prices falling, the support is no longer there and the Aussie dollar has begun falling (nearly a thousand pips in the last 6 months). As this occurs the PPP value can be used as a target for where the real exchange rate will want to end up, currently the audusd PPP value is 0.7200.
Usually large differences in the PPP value and the real exchange rate are built during periods of calm markets i.e. positive risk sentiment, and these big differences typically converge and shrink during periods of market unease. A big indication of market unease, and therefore a sign that the PPP value and the real exchange rate are going to begin to converge, is an increase in market volatility. This can be gauged with the VIX fear index and also the daily ATR indicator on various forex pairs. As volatility increase, the real exchange rate tends to correct back towards the PPP value.
So where can you find the PPP values?
There are various models in use for calculating the value, a few big institutional investment banks have their own proprietary models and central banks have their own consisting of different baskets of goods depending on what they consider is important to their respective policies.
[QUOTE=“d-pip;674571”]Interactive currency-comparison tool: The Big Mac index | The Economist
Big Mac Index - Wikipedia, the free encyclopedia
“seeks to make exchange-rate theory a bit more digestible”. ;)[/QUOTE]
The links Dpip posted are a good illustration of a type of PPP model (the basket of goods are all inclusive in the price of a Big Mac, therefore the price of a single Big Mac in different countries can be compared to come up with a PPP value) and is helpful in understanding the concept. However, the Big Mac index isn’t robust or precise enough of a PPP model to help us too much in trading.
The most used independent PPP model, and the one most useful to us retail forex traders can be found in the link below:
Monthly comparative price levels
It is updated monthly and is quite a robust model that gives an accurate and useable value. According to this model, the following are the implied exchange rates for some of the more common pairs:
Eurusd should be around 0.90 (the model provides PPP values for the individual European countries which I roughly averaged to get the combined Euro value).
Audusd should be at 0.7200
Nzdusd should be at 0.8100
Gbpusd should be at 0.800
Usdjpy should be at 105.00
Usdcad should be at 115.00
Conclusions…? The real exchange rates of Nzdusd and usdcad are pretty close to their PPP values and there wouldn’t be much trading opportunity suggested here in regards to PPP.
Eurusd is way above its PPP value right now, even after the last 6 months of down trend. This suggests further downside is very likely, especially with the ECB likely to initiate QE and the Feds raising rates next year. Eurusd reaching 1.00 over the next two years seems likely.
Gbpusd is even further above its PPP value then the eurusd is. I expect gbp to also decline, but it should be more supported then the eurusd as its monetary policy will be less accommodative.
Usdjpy is significantly higher then its PPP value, this is due entirely to Abenomics and the actions taken by the Bank of Japan to directly devalue the yen. This will be the main market driver for the pair and I would not try trading the pair back to its PPP value for the foreseeable future. A financial crisis or a change in direction in Japan’s monetary policy would be green light to short the pair with the PPP target in mind, but those scenarios aren’t on the radar at the moment.
Audusd is still significantly above its PPP value, and also above the Australians central banks assessment of where the currency should be at (they recently assessed .7500). With the mining investment fading and commodity prices falling, nearly everything is conducive to the pair falling further. Currently, the pair may be due for a corrective move to .8250 maybe even to .8350 but should be a good short opportunity up there.