United States NFIB Business Optimism Index came in at 97.9, below expectations (98) in September

USD/JPY is dropping below 158.50 in the Asian session on Tuesday, snapping a two-day winning streak and pulling back from an over two-week top touched the previous day, despite Japan’s soft PPI inflation print. Bulls turn cautious amid speculation that authorities will step in to prop up the Japanese Yen, which, in turn, weighs on the pair.