The Financial Times carried the report. The Financial Times is gated, but Reuters conveyed the essentials. --News that the ECB was informed only after the trade had already been executed points to a narrowly coordinated US-Japan operation rather than a broader multilateral effort, which may raise questions in currency markets about how much advance alignment existed among major central banks before the intervention. That could add a degree of uncertainty around euro positioning, since the trade directly involved selling euros to fund yen purchases without the ECB's prior input. The episode is likely to keep markets alert to the possibility of further unannounced action, given the intervention was already described as historic in scale and accompanied by a warning that more could follow if needed.---Earlier:Yen intervention data shows scale of Japan's fight against 40-year lows---The ECB found out about the US side of last week's historic yen intervention only after the euros had already been sold, according to the FT.Summary:The FT reported the ECB was made aware of the US move to sell euros to buy yen only after the trade had been executed, citing several people familiar with the matterReuters said it could not immediately verify the reportJapan and the US launched a rare joint yen-buying intervention last FridayBoth countries said they would take further action if needed to support the yenThe European Central Bank was informed of the United States' move to sell euros in order to buy yen only after the trade had already been executed, the Financial Times reported on Thursday, citing several people familiar with the matter. Reuters said it could not immediately verify the report.The disclosure relates to last Friday's rare joint intervention by Japan and the United States, in which authorities bought yen in a historic operation aimed at shoring up the currency after its sustained slide. As part of that action, the US reportedly sold euros to help fund its yen purchases, a step that according to the FT's sourcing was not communicated to the ECB in advance.Both Tokyo and Washington vowed at the time to take further action if needed to support the yen, underscoring the scale of concern among policymakers over the currency's weakness. The timing gap described in the FT report, with the ECB learning of the euro-selling component only after execution, raises questions about how tightly coordinated the operation was beyond the two directly involved countries, even as the intervention itself was carried out jointly and publicly by Japan and the US. ---The US decision to fund the trade with euros will be perceived as an unprecedented break from long-standing norms of cooperation among Western monetary authorities. Since World War Two, Western central banks and finance ministries have generally operated on mutual trust and consultation, with currency market interventions typically coordinated in advance. The US is said to have chosen euros over dollars specifically to avoid the trade being read as an attempt to weaken the dollar, which would have clashed with Treasury Secretary Bessent's strong-dollar stance. This article was written by Eamonn Sheridan at investinglive.com.