NEW YORK–(BUSINESS WIRE)–Kroll Bond Rating Agency (KBRA) has assigned a BBB rating and Positive Outlook on the Board of Education of the City of Chicago’s (the “Board”) Unlimited Tax General Obligation Bonds (Dedicated Revenues), Series 2017C Series 2017D, Series 2017E, Series 2017F, Series 2017H. KBRA has also assigned a BBB rating and Positive Outlook to the Board’s outstanding Unlimited Tax General Obligation Bonds (Dedicated Revenues) Series 2017B , and a BBB- rating and Positive Outlook