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Forex: Valuation
Buy when the coloured
lines are at the low end of their range, sell when they are high
This tool indicates whether
currencies represent good or bad value at current exchange rates. It is designed to
highlight currency cycles that are ultimately self-correcting owing to lagged effects of
the balance of payments on real effective exchange rates, that is to say the
trade-weighted exchange rate adjusted for comparative inflation rates, as calculated by
PIT. For comparability, exchange rates have been rebased to set year-end 1994 at 100.
In each chart the currency
index is shown as the thick
white line on the right hand
axis. The main explanatory variable, the real effective exchange rate, shown as the thin yellow line, uses the left hand axis. A Best Guess
as to the future development of the valuation ratio is also shown on the left hand axis.
Best Guesses, shown as the orange line, suggest what would happen to the
valuation ratio based on forecasts for inflation both at home and among the main trading
partners, assuming constant exchange rates. The base level is the average for the last
completed calendar year. Forecasts are based on consensus estimates for inflation, using
the weights in the PIT family of real effective exchange rates.
These real effective
exchange rates are a set of proprietary indexes calculated by PIT, based on consumer price
indexes and mutual trade between all countries in the database using an average of imports
and export weights, which have been rebalanced every five years. The most important
trading partners are used in the calculation for each country. These include the Euro-Zone
countries and up to six other major partners, representing on average some two-thirds of
mutual trade.
Please note that owing to
structural changes in the economy of a country over time, there may be a misleading
tendency for the rate to drift upwards or downwards over the long-term, whereas it should
be expected to fluctuate around a horizontal plane.
See also the Balance of Payments
charts to study in greater depth the cyclical patterns that frequently arise through the
J-curve effect on the balance of payments, whereby initial price effects may
"justify" and serve to exaggerate the currency movement before countervailing
volume effects create offsetting movements up to two years later.
Owing to the conversion of legacy
currencies into Euros, analysis is provided on the common currency, rather than for
individual countries. Trade between members of the Euro-Zone has been excluded. Historical
data is provided by creating synthetic GDP-weighted time-series for the component
currencies, expressed in the European Currency Unit
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