Japan has disclosed how its summer yen-support operations were spread across three days. The new details allow a comparison of their scale with subsequent currency moves and trader positioning, while separating observed market movements from effects attributable to intervention.
On 9 November, Japan’s Ministry of Finance (MOF) released daily details of operations totaling 15,399.3 billion yen, spread across 30 July, 31 July and 3 August. The total was already known from monthly disclosures; the new information is its timing and distribution, not an announcement of fresh intervention in November. The first day alone accounted for about 51.8% of the amount. Source: Japan’s Ministry of Finance
In EL7’s daily closing-price series, the dollar fell from 163.391 yen on 29 July to 157.142 yen on 3 August. This means a dollar decline against the yen of about 3.82%, or a rise in the yen’s dollar value of about 3.98% when calculated from the reciprocal exchange rate. On 9 November, the yen remained about 3.48% above its value on the pre-operation comparison date. This is a comparison over time; it does not isolate the movement caused by intervention. Source: EL7’s dollar/yen series
Futures positioning also changed, but did not move in one direction throughout the period. The net short position of Leveraged Money narrowed, then widened again, turning net long in September before returning to net short by 3 November. Policy rates still favor the dollar, but their difference is not a guaranteed return from holding it. Sources: CFTC, Federal Reserve, BOJ
The conclusion: the execution record is clearer, and some yen strength remains visible in closing-price comparisons. But judging policy success requires more than dividing the amount traded by the exchange-rate change. The key distinction is between calming disorderly movements and changing the economic incentives to buy or sell the currency.
The historical comparison adds an important finding: although Leveraged Money remains net short, its latest reading exceeds 119 of the 155 previous observations in EL7’s sample. A return to negative territory therefore does not mean the bearish position has regained its earlier intensity. This distinguishes position direction from historical standing; it does not forecast the price direction.
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