World Exchangers: Overview: Economic Board Games

About World Exchangers, from BoardGameGeek:

After the Incident "El Dorado" in 2082, the world was divided and dominated by 4 notorious oligarchs. They maintain peace on earth but have a bizarre tradition every 50 years - they redistribute the lands and resources by selling and buying all the major cities in the world. Will you maximize your fortune in this once-in-a-lifetime chance, or vanish in the dust of the cities that never stop changing hands in this world? Buy and sell cities at the right moment to earn the most profits and gain a variety of rewards. Become the richest oligarch to win the game! -description from the publisher