7-Eleven is buying Speedway gas stations in a $21 billion deal

· 7-Eleven's parent company is buying Speedway gas stations in a $21 billion all-cash deal.
· After tax, the deal will bring in roughly $16.6 billion for Marathon, which the company hopes to use to "strengthen [the] balance sheet. 
· With the addition of Speedway locations, Seven & I Holdings will have roughly 14,000...