Berkshire Hathaway shares drop 5% after poor fourth-quarter results, no bold moves by new CEO Abel

Some had hoped for more aggressive signals on capital deployment given the company's swelling cash balance.

How to think about everything presumably wrong with stocks and what to do about it

So, what's the plan?

Dow futures drop 500 points as oil prices spike following U.S. attack on Iran: Live updates

The war between the U.S. and Iran is threatening to widen and jolt global energy supplies.

U.S. crude oil set to top $70 a barrel when trading begins on fears of Iran supply disruption

It is unclear who is governing Iran, the fourth-largest oil producer in OPEC, after U.S.-Israel strikes killed Ayatollah Ali Khamenei.

Iran may 'lash out harder' as Khamenei's death puts Tehran on a war footing, leaving the world bracing for what's next

Iran's strategic allies Russia and China have made strong diplomatic protests, but analysts say neither is in a position to offer meaningful support.

Iran after Khamenei: What's next and what it means for the country?

Khamenei assumed power following the death of Ayatollah Ruhollah Khomeini in 1989, inheriting a revolutionary state still consolidating itself.

How the attack on Iran could impact the global oil market and economy

The U.S.-Israeli attack raises the risk of major oil supply disruption. Iran is the fourth-largest OPEC producer and sits on the critical Strait of Hormuz.