Sabri Beneshour

Brent crude is up 15% in the week since President Trump claimed the U.S.

and Iran were talking, something Iran continues to deny.

Brent crude is now at $115 a barrel, and some of that is down to new potential disruptions to oil supply.

Marketplace's Nova Sappho has that.

Buried in the ground, along with natural gas, are small amounts of helium.

It is extracted and purified along with the natural gas, and a third of the world's supply comes from Qatar and through the Strait of Hormuz.

With that supply cut off, shortages are looming for the many industries that need helium.

Marketplace's Kaylee Wells reports.

Every Monday, my colleague David Brancaccio has been speaking with experts focused on mitigating the existential threats that our world faces.

Today, a conversation with Sonia Amadei, a professor at Helsinki University and the director of the Center for the Study of Existential Risk at the University of Cambridge.

Here's David.

All of our existential threat interviews are available online at marketplace.org.

In New York, I'm Sabri Beneshour with the Marketplace Morning Report.

From APM, American Public Media.

What's new in your tax return this year?

From Marketplace, I'm Sabri Beneshour, in for David Brancaccio.

First, a quick update on the Middle East.

After President Trump said yesterday morning, shortly before markets opened, that talks with Iran were ongoing, Iran said there were no talks.

Iran has continued to attack U.S.

bases in the Persian Gulf.