Yen wavers near 159 vs dollar as BOJ keeps June hike option open

Markets caught off guard by central bank's hawkish inflation projections, split vote

Japanese Finance Minister Satsuki Katayama says Tokyo stands ready to take "strong measures" against speculative market moves. (Nikkei montage/Source photos by Kazuho Fujiwara and Ken Suzuki)

TOKYO -- The Japanese yen oscillated near 159 against the dollar on Tuesday after the central bank flagged a higher inflation outlook while keeping policy rates unchanged at 0.75% at the end of its two-day meeting.