What’s News in Markets: Meta’s Muse, Diesel Dilemma, Paramount's Breakthrough

September 26, 2026

AI Summary

5 min read

On Wednesday, the benchmark 10-year Treasury yield climbed above 5% for the first time since 2007, marking its biggest one-day jump in more than a year. That single number—5%—captured the week's dominant market narrative: a perfect storm of elevated oil prices, persistent inflation concerns, and fresh economic data showing strong business activity and job growth. Investors responded by betting that interest rates may have to stay higher for longer, or even rise further. Despite the bond market turmoil, the Nasdaq climbed 2.1% for the week, the S&P 500 rose 1.2%, and the Dow finished 0.3% higher. Brent crude futures increased 4% to settle above $90 a barrel.

Meta's Muse Stuns the Market

Technology stocks led the S&P 500 this week, thanks in large part to Meta. Shares of the Facebook parent surged 11% on Monday and ended the week nearly 13% higher after its new AI agent, Muse, shot to the top of Apple's App Store following its debut earlier this month. The rally added $192 billion to Meta's market value in a single day. Muse is essentially a personal AI assistant that can take actions for you—things like booking appointments and shopping online. Before this week's news, investors were questioning whether the billions Meta was spending on AI would ever pay off. Now, one Truist analyst estimates Muse could generate an additional $28.5 billion for Meta by 2030.

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What you'll learn

1 (00:47) **Bond Yields Surge Past 5%** - The benchmark 10-year Treasury yield climbs above 5% on Wednesday, its highest level since 2007, driven by a perfect storm of elevated oil prices, persistent inflation, and strong economic data.
2 (01:27) **Market Recap: Mixed Week for Major Indexes** - The Nasdaq climbs 2.1% for the week, the S&P 500 rises 1.2%, and the Dow finishes 0.3% higher, while Brent crude futures settle above $90 a barrel after a 4% increase.
3 (01:42) **Meta's Muse Drives $192 Billion Rally** - Shares of Meta surge 11% on Monday and end the week nearly 13% higher after its new AI agent, Muse, tops Apple's App Store, adding $192 billion to its market value in a single day.
4 (02:30) **Muse Lifts Tech Sector, Hurts Financials** - The broader tech sector gains momentum from Meta's rally, with chipmakers Intel and AMD each rising about 13%, while financial stocks sell off on fears that AI agents could replace some services.
5 (03:01) **Oil Stocks Tumble on Diesel Export Proposal** - The S&P 500's energy sector falls 3% as the industry digests a new policy proposal from the Trump administration to restrict diesel exports in an effort to lower record-high domestic prices.
6 (03:52) **Refiners Hit Hard by Export Ban Fears** - Shares of U.S.-based refiners like Marathon Petroleum and Valero fall 7.6% and 6.4% respectively as analysts estimate the proposed export ban could significantly impact operations.
7 (04:02) **Paramount Merger Clears Major Hurdle** - Paramount moves one step closer to completing its $81 billion takeover of Warner Bros. Discovery after a dozen states, led by California, settle their lawsuit to block the merger.

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Show Notes

What does Meta’s new AI agent mean for finance stocks? And how will the Trump administration’s plan to lower diesel prices impact oil companies? Plus, what did Paramount concede to get its $81 billion Warner Bros. takeover back on track? Host Imani Moise discusses the biggest stock moves of the week and the news that drove them.

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