GM's new CEO Mary Barra speaks onstage at the FORTUNE Most Powerful Women Summit on October 16, 2013 in Washington, DC. - 

General Motors announced this morning that Mary Barra, GM's current head of global product development, will succeed Daniel Akerson as chief executive officer when he retires next month.

Five federal agencies are set to reveal the long-awaited Volcker Rule, a centerpiece of the Dodd-Frank financial reform plan. The rule will limit proprietary trading, in which banks place bets with big trades, using their own money.

This morning in Stockholm, Sweden, three American men will be awarded the Nobel Prize in Economics. Yale's Robert Shiller and the University of Chicago's Eugene Fama and Lars Peter Hansen are being recognized for their at times conflicting research into how financial markets work. Before he departed, Marketplace Morning Report host David Brancaccio spoke with Lars Peter Hansen.

Follow David Brancaccio at @DavidBrancaccio