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Hey listeners, it's Saturday, August 9th.

I'm Jack Pitcher for The Wall Street Journal, and this is What's News and Markets.

Our look at the biggest stock moves of the week and the news that drove them.

Let's get to it.

Major stock indexes bounce back this week, shrugging off tariff and economic concerns.

As has been the theme for most

of the last two years, the biggest mega cap technology companies led the way. Apple and

Nvidia shares both posted outsized gains this week, collectively adding hundreds of billions

of dollars in market value. Investors are continuing to pile into AI-related stocks, helping cover up other weak spots in the market.

President Trump's sweeping new reciprocal tariffs went into effect at midnight Thursday.

Markets largely took the rollout in stride, and many countries are in the midst of negotiations

seeking fresh trade deals or carve-outs. For the week, the S&P 500 added 2.4%, while the Dow was 1.3% higher.

The NASDAQ composite rose 3.9% to close Friday at a new record.

It was a great week for Apple, whose CEO Tim Cook held a productive visit to the White House.

Cook announced it an event with the president on Wednesday that Apple was pledging to invest

$100 billion in its domestic manufacturing capabilities.

At the same event, Trump said he was imposing roughly 100% tariffs on all chips coming into the U.S.

But would exempt Apple and other tech companies that had promised to manufacture more domestically.

Chips are a key component of nearly all Apple devices, and the iPhone maker's shares rallied 13% on the week,

...