2015/2/11 ・http://jp.reuters.com/article/marketsNews/idJPL4N0VK35Y20150210 ・http://www.nikkei.com/article/DGXLASGC10H0L_Q5A210C1MM8000/ ・http://jp.wsj.com/articles/JJ12252063342557133291520323617010834822248?tesla=y&tesla=y