On June 29, when Chief Executive Mark Vergnano rang the NYSE opening bell and officially launched Chemours (CC), the performance chemicals unit spun off from DuPont De Nemours (DD), it was one more plume in the cap of New York-based Evercore Partners (EVR). Mergers and acquisitions have fanned up into a hotbed as the global economy climbs out of the macro swan dive that drove Evercore to report losses in 2007 through 2009.