Japan's Ministry of Finance vigilance against speculative bearish yen bets warns of intervention risks as 162 versus the dollar is breached, says Vishnu Varathan, managing director and head of macro strategy, APAC at Mizuho Securities. The yen weakened to a fresh 40-year low against the dollar early Tuesday as it broke above 162. Japan Finance Minister Satsuki Katayama said the government stands ready to take appropriate action in the FX market that could be "decisive." Varathan says marginal yen bears should be braced for intervention to extract a price. (venkat.pr@wsj.com)