It's like mixing oil and oil. Chevron will buy Hess Corporation, both of fossil fuels fame.

I'm David Brancaccio in Los Angeles. Chevron mixing in Hess comes after a long dispute with ExxonMobil over Hess's partial ownership of oil operations off Guyana.

Marketplaces Henry Up has more on while oil giants have such interest in oil fields in that stretch of water east of Venezuela.

Oil off the coast of Guyana was first discovered in 2015, and it's the kind of resource oil companies just don't come across that often anymore.

David Goldwyn, president of Goldwyn Global Strategies, says it's a large basin.

And once you stick that straw in it, even if it's, you know, sort of a mile down, you can

continue to drain it at a pretty steady rate for probably 20 years.

Which is a lot cheaper than getting crude from one of the last big discoveries, fracked shale oil in the Permian Basin in the U.S.

So shale, you have to essentially constantly be drilling and fracking new wells because they have a very large initial production rate and then it plateaus.

Oil production in the Permian appears to be approaching a plateau, Goldwyn says. Production near Guyana,

meanwhile, is still ramping up. But oil companies aren't just interested in the amount of oil there,

but also the type. Matt Smith, an analyst with Kepler, says it's a medium-to-light crude.

It's a barrel which you can pull from it when you refine it, gasoline and diesel, a decent

amount of both of those. So it's a very attractive barrel. Especially Smith says in Europe, which has

been trying to cut down imports of similar types of crude from Russia, ever since that country invaded

Ukraine. I'm Henry App for Marketplace. Also, there is that club of 500 companies of great interest to stock investors, the S&P 500.

Because Hess Oil becomes part of Chevron now, Hess disappears, opening up a spot in the index.

That will be filled by the mobile payments company, formerly known as Square.

That firm is now called Block, which becomes

part of the S&P 500 starting on Wednesday. S&P and NASDAQ futures are both up three-tenths percent now.

Do you have a stake in the oversight of companies listed on the stock exchange? If so, know that the boss of what to us may be an obscure regulatory agency is

stepping down. Erica Williams is leaving the Public Company Accounting Oversight Board.

...