Article from Investing.com By Wayne Cole SYDNEY, (Reuters) - The U.S. dollar went on a rollercoaster ride versus the yen on Monday as markets suspected more intervention from Japanese authorities, while Asian shares rallied on just the hint of an eventual slowdown in U.S. rate hikes. The dollar had started in a bullish mood with an early rush up to 149.70 yen, only to retreat as far as 145.28 in..