NEW YORK–(BUSINESS WIRE)–Kroll Bond Rating Agency (KBRA) has assigned a senior unsecured debt rating of BBB+, a subordinated debt rating of BBB, and a short-term debt rating of K2 to First Busey Corporation (NASDAQ:BUSE), a bank holding company headquartered in Champaign, Illinois. In addition, KBRA has assigned senior unsecured debt and deposit ratings of A-, a subordinated debt rating of BBB+, and short-term debt and deposit ratings of K2 to the subsidiary bank, Busey Bank. The Outlook on a