chi-riverpoint (2) Hines’ River Point development at 444 W. Lake St. opened about one year ago, and has attracted tenants from other top buildings.

CHICAGO—The vacancy rate among the CBD’s top office properties has finally started to tick up as many tenants left behind empty spaces after moving into downtown’s newest trophy buildings. That was the conclusion of researchers from MB Real Estate, who just released their latest index report, which examines the CBD’s 30 newest class A buildings with more than 300,000 square feet. This set of buildings, which contains some of the CBD’s most desirable space, serves as a leading indicator of office market conditions.