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Understanding the US Dollar Index |
The US dollar index (USDX Chart and Analysis) is an important analytical tool for traders in just about any market. Most investors don't actually trade the USDX, but use it as way to analyze the relative strength or weakness of the US Dollar versus the major world currencies.
The USDX compares the US dollar (USD) against a basket of other world currencies. This basket represents most of the largest free floating, major currencies in the world on a weighted average basis. The currencies included are the euro, yen, British pound, Canadian dollar, Swedish krona and Swiss franc. Each of these currencies are given a weight with the largest weight given to the euro.
Because the euro is typically half the total weight included in the average the chart for the USDX will often look like a chart of the USD/EUR futures contract. Spot forex traders will notice that the USDX is very similar to an inverse of the EUR/USD spot contract. However, because the USDX includes 6 different currencies it is a better measure of USD strength than any single currency pair including the EUR/USD. See charts, analysis, videos and data by clicking on the flags
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Essential Reading for Traders
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| | | | | The USDX was established in 1973 with a starting value of 100. That means that if the USDX is measuring less than 100 the USD has lost value compared to what it was worth in 1973 and if it is above 100 then the USD is stronger than it was in 1973. If the USDX rises above 100 the USD is relatively stronger than it was in 1973.
The USDX is particularly useful for traders in the bond, currency and gold markets. For example, a strong USD will drive down the price of gold, which means that gold traders are very interested in a break out on the USDX even though they may not be trading the USD directly.
Similarly, global crises often increase demand for the USD as investors seek a shelter from uncertainty. This will drive the value of the USD up and often bond yields will drop. These are just two examples of how the USDX is one more intermarket tool you can use for evaluating capital flows and finding new trading opportunties.
You can find analysis on the USDX daily on our pairs analysis pages in the forex section of the Learning Markets website. If you are interested in trading the USDX you have two attractive alternatives. First, you can open a futures account. There are futures and options on futures available for the USDX that trade on the New York Board of Trade.
Second you can trade ETFs that track the USDX itself. PowerShares offers two ETF alternatives for trading the index. The first is UUP which invests in long futures contracts on the USDX, which means it will move the same direction as the dollar index. The second is UDN which invests in short futures contracts on the USDX, which means that it will rise in value when the dollar index weakens. If you are bullish the dollar you could buy UUP and if you are bearish the dollar you could buy UDN.
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