This year's rally in equity markets has not been equally kind to all sectors of the market. DowDupont Inc. has seen relatively muted returns this year, especially compared to the broader indices. The company spun off Dow, its material science division, on April 1. The market has not been particularly impressed. Another spinoff, its agricultural business Corteva, will follow June 1. This week's guest, Jim Osman of Edge Consulting Group, says this presents a buying opportunity -- for all three stocks.