Bloomberg Exxon Mobil Corp.’s deal in January for a swath of Permian Basin drilling real estate came with a sweetener for the sellers. The heirs of oil tycoon Perry Bass will get $1 billion in cash by 2032 — if drilling goes well for Exxon. That payout would be on top of the $5.6 billion in Exxon shares the Bass …

Bloomberg An obscure gasoline additive could lead to a windfall of more than $6 billion for struggling US oil refiners. There’s just one hurdle: the Internal Revenue Service. Fuel makers are examining whether their occasional use of butane — a liquefied petroleum gas — qualifies for a big tax credit under a now-expired law that was intended to promote the …

Bloomberg Sunrun Inc., the San Francisco-based residential-solar company, surged the most in 10 weeks after Bank of America Corp. said the company expects to be cash-flow positive by year-end. Sunrun gained 6.9 percent to $6.04 at 11:07 a.m. in New York, the most intraday since Aug. 24. The company is expanding into new markets and shifting its financing models so …