The yen soared over 2% on Thursday, after comments by senior BoJ officials triggered speculation that Bank of Japan might exit negative interest rates at the December 18-19 meeting. BoJ officials are usually tight-lipped about any plans to change policy and last week’s signals were quickly picked up by investors and sent the yen flying. The BoJ has expressed concern over the depreciating yen and last week’s comments from Governor Governor Kazuo Ueda and BoJ Deputy Governor Ryozo Himino may have been a coordinated move to boost the Japanese currency.