ECB Cuts Key Interest Rate; Big Banks Show Interest in Aramco

P.M. Edition for September 12th: The European Central Bank cuts its key interest rate, and launches its largest stimulus package in more than three years. Reporter Paul Hannon has the details. Plus, big U.S. investment banks are showing interest in Saudi oil giant Aramco. Maureen Farrell explains. Plus, Tarini Parti has a look ahead to Thursday night's debates. Annmarie Fertoli hosts.

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