Wall Street has stepped up with $40 billion to help AT&T buy Time Warner

Getty Images/Justin Sullivan It's happening. AT&T announced late Saturday night that it has agreed a deal to buy Time Warner for $107.50 per share, with Time Warner shareholders getting $53.75 per share in cash and $53.75 per share in AT&T stock. The deal values Time Warner at $85.4 billion, and makes for a massive payday for the Wall Street banks advising on the deal.  The cash portion of the deal is going to be financed with new debt and cash already on AT&T's balance sheet. "AT&T has an 18...