The Aon Center lost nearly half of its value since the property’s last valuation in 2018 as the prominent skyscraper struggles with increased vacancy, rising real estate taxes and a hefty loan balance. 
The 2.8M SF office tower at 200 East Randolph St. reported a new value of $414M, down from a valuation of $780M when JPMorgan Chase lent $536M for the property in 2018, per a Morningstar email alert. The loan moved to special servicing in February, but the borrower negotiated a modification and three-year extension this summer.