...The 'AAA' rating incorporates Suffolk's 'aaa' financial resilience, supported by ample budgetary flexibility and an expectation that unrestricted general fund reserves will equal at least 7.5% of spending. The city has maintained unrestricted reserve balances above 35% of general fund spending since fiscal 2015. The city's demographic and economic trend and level metrics are favorable, and its long-term liability burden is moderately low....