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Hey listeners, it's Saturday, December 20th.

I'm Francesca Fontana 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.

It wouldn't be the holiday season for the stock market without traders hoping for positive momentum to spark a Santa Claus rally.

During the week, our last full trading week before Christmas, stocks were trying for fresh records, with some fresh

optimism fueling a rally Thursday after an encouraging inflation readout. An end-of-year rally would be a

welcome gift to the market, given how a cloudy economic picture and persistent AI-related jitters have been weighing on stocks.

On a weekly basis, the major indexes ended mixed.

The Dow lost 0.7%, while the S&P 500 edged 0.1% higher, and the NASDAQ rose half a percent.

Speaking of AI jitters, let's look at Micron, the memory chip maker whose latest earnings

report brought some good news to the semiconductor sector. So late Wednesday, Micron

posted a jump in quarterly revenue and raised its outlook,

with investors cheering the results and the trend underpinning the results.

There's a shortage of memory chips, thanks to the AI boom, and it doesn't look like it's

ending anytime soon.

Demand for artificial intelligence has developers scrambling to buy enough of these essential

chips, driving up price tags and giving sales a boost for companies like Micron.

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