About 45 minutes west of downtown Chicago lies a rather unassuming, glass-encased data center that some of the world’s largest markets depend on. By one 2018 estimate, at least $25 quadrillion of notional trade volume passes through the facility every day. Most Read from Bloomberg The Aurora, Illinois, complex has served as the primary hub of digital operations for the world’s largest futures exchange operator CME Group Inc. for nearly two decades. The 450,000-square-foot facility is famous among high-fr ...