The hours from Sunday afternoon through Monday morning brought back-to-back deal announcements totaling more than $50 billion, making for one of the higher-dollar mergers and acquisitions days in recent memory.

The largest was the acquisition of TD Ameritrade by competitor Charles Schwab for $26 billion. Add to that luxury giant LVMH’s $16.2 billion deal to acquire Tiffany & Co. and the roughly $9 billion that Swiss pharma company Novartis is paying for The Medicines Co., and pretty soon you’re talking real money.