Yen Soars 1.2% Amid Speculation of Intervention

The yen surged on Wednesday, sparking speculation about potential intervention by Japanese officials. The currency rallied as much as 1.2% to 158.22 per dollar during US trading hours, before paring some of its gain.

Market participants were left without clear signs that official action had taken place, but several analysts pointed out the significance of the move.

'I don't think the move was an intervention or rate check, but there is a lot of caution around the 160 level,' said Marito Ueda, president of SBI FX Trade.

The yen's sudden move in New York trading reverberated across the $9.5-trillion-a-day currency market, with the Bloomberg Dollar Spot Index falling as much as 0.3% and a gauge of emerging-market currencies climbing.