What are these indexes?
The goal of any dollar index to to assess how the US Dollar is doing overall as a currency. One of the most popular symbols today is the Dollar Index by ICE – denoted as the DXY. Dow Jones and FXCM developed an alternative to the DXY with a different formula. It’s a newer and relatively simpler take based on just four popular currencies to contend with the arguably outdated and more complex ICE DXY formula.
How each index is calculated
The ICE Index is geometrically weighted on international trade data. The geometric weighting means that relative currency hedges change by the value of the index— which makes it costly for market makers to hedge and make markets on appropriately. The outdated weights mean that it’s essentially an inverse Euro chart.
The DJ FXCM Index is arithmetically weighted using values from January 1, 2011—well-after the inception of the euro. It’s designed to mimic actual USD-long positions vs the AUD, JPY, GBP, and EUR. It’s substantially easier to make markets on and continue to see growing use—both from market makers and users.
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