Japan’s 10-year government bond yield rose half a basis point to 3.035%, while the 20-year yield increased 3.5 basis points to 3.920%. Inflation concerns and expectations for Bank of Japan rate increases supported yields, while fears of a prolonged U.S.-Iran conflict lifted crude oil prices and U.S. Treasury yields overnight. Investors were watching Middle East developments ahead of the Federal Reserve’s rate decision later Wednesday. An earlier report had placed the 20-year yield at 3.925% and the 30-year yield at 4.190%.