Your morning briefing, the business news you need in just 15 minutes.On today's podcast:(1) CMA Chief Executive Sarah Cardell joins to discuss Microsoft's new submission for its Activision bid(2) The UK-based tech giant Arm has filed to list its shares on the Nasdaq, in what's set to become the biggest US stock market launch of the year.(3) S&P has followed Moody's in downgrading and cutting the outlook for a slew of US banks.(4) It's been reported that Elon Musk told Pentagon officials he had personally spoken with Vladimir Putin in October. See omnystudio.com/listener for privacy information.