Margins are expected to drop for both fuels and petrochemicals businesses in the fourth quarter.

The proposed expansion of Tallgrass Energy's pipeline system through its Pony Express unit will not only act as a key catalyst for future growth, but could also be a key factor in terms of the partnership's quarterly distribution growth over the next several years.

Welcome to edition 222 of Insider Weekends. Insider buying increased last week with insiders buying $49.49 million of stock compared to $35.47 million in the week prior.