...On Dec. 1, U.S. Bancorp closed on its acquisition of MUFG Union Bank's core regional franchise. As a result, we raised our rating on MUFG Union Bank to '##-/A-1+' from 'A/A-1' and removed the ratings from CreditWatch, where we placed them with positive implications on Sept. 23, 2022 (see "MUFG Union Bank N.A. Upgraded To '##-' On Acquisition By U.S. Bancorp; Outlook Negative; MUFG Americas Ratings Withdrawn," Dec. 1, 2022). Notably, it's the largest acquisition USB has made since the financial crisis and could lead to heightened integration risk, a reduction in capital ratios, and loan concentration in California, contributing to our negative outlook. These issues are somewhat offset by expected expense and revenue synergies once the entity is integrated. USB may be required to hold additional debt pending the finalization of an advanced proposal for rule-making by regulators. This could result in USB needing to hold a yet to be specified amount of debt (our estimate is $10 billion-$15...