The Japanese yen jumped sharply against the U.S. dollar on Monday, briefly strengthening to the high 155-yen range after trading around 157.20 yen per dollar earlier in the session. [1]

It was the first time since Friday that the currency reached the high 155-yen range. [1]

The swing came as volatility rose in a thinner market, with fewer participants because Japan's markets were closed for a holiday. [1]

The yen had already moved from the 157-range to the high 155-range on May 4 during holiday-thinned trading. [1]

Monday's trading left the yen in the high 155-yen range against the dollar, its strongest level in the session. [1]