The S&P 500 slid 0.11% to 6,816.89, and the Dow fell 0.56%, even as the Nasdaq edged up 0.35%. The gains from the week's fragile ceasefire appear to be unraveling amid fresh energy pressures.

Why it matters

Geopolitical tensions and rising energy costs threaten both near-term gains in your retirement portfolio and long-term inflation outlook.

The big picture

This sets the tone for investors at the start of earnings-heavy Wall Street week.

Immediately following the failed talks, President Trump announced the U.S. Navy will begin blockading Iranian ports-but will allow non-Iranian vessels to transit the Strait of Hormuz.

Why it matters

The move increases regional tensions and risks disrupting global oil flows, while stopping short of full closure of a key waterway.

The big picture

This calibrated pressure strategy could define U.S. posture in the Middle East this week.

The sexual misconduct allegations against Rep. Swalwell may propel demands for expulsion votes not only for him but other members facing ethics probes.

Why it matters

If lawmakers are expelled, it could reopen seats and alter the balance in Congress, affecting representation and legislative agendas.

The big picture

The House is back in session this week, so the fallout could translate quickly into action.

A U.S. delegation wrapped up ceasefire talks with Iran in Islamabad, but left without agreement, underscoring continuing tensions in the Iran conflict.

Why it matters

The war in Iran affects global energy prices and U.S. geopolitical posture-its ripple effects touch Americans' gas bills and national security.

The big picture

With the Iran conflict unresolved, its international implications will shape foreign policy debates this week.

After 21 hours of marathon negotiations in Islamabad on April 11-12, the U.S. and Iran left without a peace deal, leaving the fragile ceasefire, due April 22, on shaky ground.

Why it matters

The breakdown threatens renewed conflict, could destabilize oil markets, and tests U.S. diplomacy in the Middle East.

The big picture

What happens now-renewed war or renewed talks-will shape global markets and U.S. strategy this week.