Using Currency Baskets to Analyze FX Exposure

Summary

The question highlights a difficulty in analyzing foreign exchange rates: bilateral pairs that share a currency can move together because of changes affecting that currency. It asks whether another asset, such as gold, could serve as a common reference for comparing currencies.

The answer suggests using a currency index or a trade-weighted basket instead. A dollar index can summarize dollar performance, while broader indices compare a currency with a weighted set of other currencies. Such baskets can help analysts form a view on one currency without relying on a single bilateral cross. The response cautions that gold may be substantially more volatile than the currencies being compared, making it a potentially unstable benchmark. The document offers these alternatives conceptually but provides no empirical comparison of basket indices against gold or other normalization methods.

Key ideas

• Shared-currency FX pairs can reflect common exposure to that currency’s economic drivers.
• Currency indices and trade-weighted baskets summarize performance against multiple currencies.
• Basket measures can support analysis of one currency without taking a view on a single bilateral cross.
• Gold may be too volatile to serve as a stable reference for currency comparisons.

Tags

# Analysing FX Data


# Analysing FX Data












When analysing currencies, the data always comes in pairs so it is hard to normalise a multivariate time series of data e.g. if I have GBPvsUSD, EURvsUSD and CADvsUSD then changes in the US economy will affect all these series in a potentially undesirable way.

What is the consensus on instead of using exchange rates to analyse currencies, introducing a conditional variable i.e. the price of gold? We can then analyse the currencies using this to peg them against.

## Answer by Shahar (score 1)

https://quant.stackexchange.com/a/14522

If you are specifically looking to analyze the US dollar, you can use the US dollar index $USDX (or dollar spot index DXY). There are many additional "baskets" for this and other currencies, such as Markit iBoxxFX Trade-Weighted Indices, based on central banks’ basket exchange rates, which

> track the performance of a currency against a defined basket of currencies. The following currency indices are calculated: AUD, CAD, CHF, EUR, GBP, JPY, NOK, NZD, SEK and USD. Each basket is limited to the five currencies with the largest weights in the relevant central bank’s official index. The indices enable market participants to express a view on one currency rather than taking bilateral views with single currency crosses.

I think the problem with gold would be that it presumably changes much more [i.e. is much more volatile] than the currencies you're pegging it to.

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