DuPont and The Dow Chemical Company announced that their boards of directors unanimously approved a definitive agreement under which the companies will combine in an all-stock merger of equals. The combined company will be named DowDuPont. The parties intend to subsequently pursue a separation of DowDuPont into three independent, publicly traded companies through tax-free spin-offs. This would occur as soon as feasible, which is expected to be 18-24 months following the closing of the merger,...