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Understanding August’s FX Market Anomalies: Yen Appreciation, USD Trends, and GBP Low Prices

In the foreign exchange market, certain currency movements can show consistent trends during specific periods. These trends are known as “FX anomalies.” Although the theoretical basis for these anomalies isn’t always clear, they are interesting phenomena derived from historical data. In this article, we will overview various anomalies observed in the FX market during August, including the well-known early-month yen appreciation trend, the “Go-To Day” US dollar buying anomaly, and the British pound low anomaly. Understanding these anomalies can help traders navigate the August forex market more effectively.

1. What are August’s “FX Anomalies”?

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In August, the FX market often shows specific trends or patterns known as “FX anomalies.” Anomalies refer to unusual phenomena or trends that deviate from typical movements and are not always backed by clear theoretical grounds.

Several factors contribute to August’s FX anomalies. Firstly, there is a strong tendency for yen appreciation at the beginning of August. Historical data over the past 20 years shows that August often experiences a yen appreciation trend. This suggests that for some reason, the yen tends to be bought more frequently in August.

Additionally, August is marked by Japan’s “Obon Holiday,” a long vacation period. During this time, Japanese companies and investors tend to close their positions and spend money. Particularly, there is a tendency to liquidate positions before the Obon holiday, leading to a return of foreign currencies to Japanese yen. This can contribute to yen appreciation and the associated effects.

August’s FX anomalies are not solely based on past trends or data. The forex market is influenced by various factors, so anomalies do not always manifest as expected. However, understanding these anomalies and incorporating them into trading strategies can be a valuable approach for more effective trading.

In the next section, we will discuss specific examples of August’s FX anomalies.

2. Early-Month Yen Appreciation Anomaly – The Impact of Obon Holiday?

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The early-month yen appreciation anomaly in August may be influenced by the Obon Holiday. Obon is a period in mid-August when many large Japanese companies take a long vacation. Before this period, many companies and investors tend to close their positions. As Japanese investors close their positions, they often convert foreign currencies into Japanese yen, which contributes to yen buying and strengthens the yen.

Reasons for the Early-Month Yen Appreciation Anomaly

The reasons for the early-month yen appreciation anomaly include:

  1. Position Liquidation by Companies and Investors: Before the Obon Holiday, many companies and investors aim to liquidate their positions. This increases the demand to convert foreign currencies into Japanese yen, resulting in a yen appreciation trend.


  2. Large Redemption of US Treasuries: August is a time when large redemptions of US Treasuries occur. This increases the demand to convert foreign currencies into Japanese yen, making the yen appreciation effect more pronounced.


Points to Be Cautious About

However, these anomalies are based on empirical rules and do not always occur in the same manner every year. Forex and stock index movements are influenced by various factors, so caution is necessary. Recently, the trend of August’s yen appreciation anomaly has been weakening. This could be due to increased awareness of this anomaly among market participants, resulting in its reduced impact.

Therefore, the early-month yen appreciation anomaly is likely influenced significantly by the Obon Holiday. However, it is important to use these anomalies as a reference while considering other factors in trading decisions.

3. The “Go-To Day” US Dollar Buying Anomaly

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For Japanese importers and companies requiring dollar payments, the “Go-To Day,” which occurs several times a month (on the 5th, 10th, 15th, 20th, 25th, and 30th), is crucial. On these days, companies tend to sell yen and buy dollars. Consequently, financial institutions need to purchase large amounts of US dollars on these days, which can lead to temporary dollar shortages.

When financial institutions experience a dollar shortage on Go-To Days, they need to purchase dollars from the forex market. This increased demand for dollars typically starts around 9 AM on Go-To Days, leading to an upward trend in the USD/JPY rate.

The “Go-To Day” US dollar buying anomaly is a simple trading strategy requiring no complex analysis. Specifically, traders enter long positions in USD/JPY on Go-To Days and switch to short positions when dollar buying demand peaks. This approach is very straightforward and accessible for beginners.

With about six opportunities each month, the Go-To Day US dollar buying anomaly is popular due to its simplicity. Additionally, it does not require other indicators, making it suitable for beginners.

In the next section, we will explore the low price anomaly of the British pound in August.

4. British Pound Low Price Anomaly from August 6 to 17

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In August, there is a tendency for higher probability of bullish candles in currency pairs involving the British pound. However, from August 6 to 17, a low price anomaly for the British pound was observed. The specific trends noted are as follows:

  1. On the 9th, the probability of bullish candles for GBP/JPY and GBP/CAD was below 19%, and for GBP/USD, it was below 14%, indicating low prices during this period.


  2. On the 17th, the probability of bullish candles for EUR/GBP rose to 81%, indicating that the euro was rising while the British pound was falling, suggesting a higher likelihood of low prices for the British pound.


These observations suggest that the British pound low price anomaly is particularly prevalent between August 6 and 17. Traders should exercise caution during this period.

Additionally, a high probability of bullish candles for EUR/GBP indicates that the euro was strong during this time.

5. Other August FX Anomaly Examples

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There are other intriguing anomalies in the forex market during August. Here are some examples:

a. USD/JPY Downtrend from Late July

The USD/JPY pair often experiences a downtrend from late July to early August. This trend is attributed to increased demand for yen due to the Obon Holiday.

b. Risk Aversion and Safe-Haven Currency Movements

August can be a time of risk aversion, with investors seeking safe-haven currencies like the Swiss franc and Japanese yen. Observing these movements can provide valuable insights.

Understanding these anomalies helps traders better navigate the August forex market and potentially identify profitable opportunities. However, it’s crucial to combine these insights with other analysis techniques and be mindful of various market factors.

Happy trading!

FXトレード・フィナンシャル
MATRIX TRADER