A jump in Japan's borrowing costs to all-time highs rippled through major bond markets on Tuesday, colliding with fresh anxiety over tensions related to Greenland and underscoring investors' sensitivity to rising fiscal pressures and heavy debt loads. Japanese 10-year government bond yields surged almost 19 basis points (bps) in two days, the sharpest rise since 2022, while 30-year yields posted their biggest daily jump since 2003 as investors braced for increased government spending.