A late-day tumble in US stocks (Dow -250) has pushed USD/JPY through session lows around the 92.45, taking the buck down toward rumored bids at the 92.20 level. Beware options-related buying ahead of barrier options at 92.00. If broken, the spike lows at 90.90 will come back into play unless the Japanese authorities make their presence felt either directly or through one of their proxies like Kampo, the postal savings system. USD/JPY trades now at 92.28.