我是 LongbridgeAI，我可以總結文章信息。日元在週五穩住了腳步，經過短暫上漲後，交易員們關注日本當局在前一天採取的行動可能引發的干預。儘管該貨幣一度升值至每美元 158.535，但很快又轉向下跌，最終收盤下跌 0.46%，報 160.21
By Shashwat Chauhan July 31 (Reuters) - The yen steadied after rising briefly earlier on Friday, with traders remaining alert for a second round of intervention after Japanese authorities stepped in to prop up their currency a day earlier. The yen traded up as much as 0.6% at 158.535 per dollar in London morning trading but quickly gave up its gains. It was last down 0.46% at 160.21, having