Usd/jpy - 90.50 ... Dlr's retreat to 90.27 due to active cross buying in yen on the back of tumbling U.S. stock markets (DJI is currently down over 300 points). Stops at 90.70/80 n 90.40/50 had been triggered but sizeable bids fm U.S. names (to protect stops below 90.20 n 90.00) are building up in the region of 90.00/90.30. On the upside, offers fm st specs are seen at 90.70/80 n 91.00/10 with mixture of offers n stops emerging abv 91.40/50 n 91.70/80.