📈 Meta's Muse AI Dominates Tech Landscape as Broad Market Ends Mixed on September 24, 2026
Bottom line
The market saw a mixed close on September 24, 2026, with the Dow Jones Industrial Average declining while the S&P 500 and Nasdaq Composite finished flat. This divergence was largely driven by significant shifts within the technology sector, primarily fueled by the rapid rise and varied reception of Meta's new AI agent, Muse. While Muse propelled some tech stocks and partnerships higher, it also triggered significant declines in others, particularly in e-commerce and travel, as investors grappled with its disintermediation potential.
Market trend today
The Dow Jones Industrial Average experienced a decline, while the S&P 500 and Nasdaq Composite ended flat on September 24, 2026, as the 10-year Treasury yield approached 5.2%. The technology sector, represented by the XLK ETF, retreated late in the session, reflecting a complex interplay of AI-driven disruption and macroeconomic headwinds. Meta Platforms (META) was a standout performer, surging 4.6% to $778.88 due to strong demand for its AI agent Muse and expanded AI hardware plans. Conversely, Etsy (ETSY) shares plunged 8.1% due to concerns that Muse could disintermediate its marketplace. Homebuilders and related industries faced pressure as home purchase cancellations are expected to rise with interest rates hitting a 20-month high, and builders are cutting prices as new home supply holds at 8.5 months. In the energy sector, Goldman Sachs revised its Brent crude oil forecast upward to $85 a barrel, but this still implies a retreat from current prices, signaling expectations for geopolitical risk premiums to fade.
Deep dive — high-value events
1. Meta's Muse AI Agent Creates Tech Divide and Sparks Stock Volatility
Meta Platforms (NASDAQ: META) has ignited significant market movement with its new AI agent, Muse. The agent has rapidly climbed to the #1 spot for free downloads on app stores and is garnering strong reviews for its capabilities in shopping, scheduling, and negotiation. This success has had a bifurcated impact on the tech landscape.
- What happened: Meta's stock (META) jumped 4.6% to $778.88, fueled by Muse's performance and announcements of expanded AI hardware distribution, including new AI glasses lineups and plans for over 100 AI-glasses styles by year-end. CEO Mark Zuckerberg also unveiled new VR glasses and a Muse Charm pendant, reinforcing the commercial viability of Meta's AI strategy. Notably, competitors like OpenAI (GPT-6 Sol and Luna) and Anthropic (Claude Opus 5.5) have been overshadowed. Meta's stock is up 19.8% year-to-date.
- Why it matters: Muse's disruptive potential is a paramount concern for e-commerce and travel platforms. Amazon (AMZN) has blocked Muse from purchasing products, citing terms of service violations, in a bid to protect its ecosystem and advertising revenue. This move underscores the intense competition to control customer interaction and data. Conversely, Walmart (WMT) and Shopify (SHOP) are embracing Muse, potentially capturing market share from Amazon if the AI agent achieves widespread adoption.
- Second-order effects and who's exposed: The rise of Muse directly impacts companies reliant on user traffic and transaction fees. Etsy (ETSY) saw an 8.1% decline as investors worried about Muse's ability to compare prices and autonomously handle tasks, eroding the "consumer inertia" that benefits marketplaces. Goldman Sachs has highlighted companies like Netflix, Expedia, and Booking Holdings in a "consumer inertia" risk basket, which has fallen significantly. Industries like banking, media, and travel are also exposed to potential disintermediation. On the positive side, CPU manufacturers like Intel, Arm Holdings, and Advanced Micro Devices (AMD) could see increased demand, although AMD's valuation is flagged as "very expensive". Partnerships with Muse, such as Shopify, PayPal, and Expedia, have also seen their stock prices rise.
- What to watch next: The key is to monitor how widely Muse is adopted and how other major platforms like Amazon respond to this challenge. The competitive response from other AI developers and the regulatory landscape surrounding AI agents will also be critical. Furthermore, investor sentiment regarding the long-term impact on consumer behavior and corporate revenue streams will be a significant driver.
2. Kinross Gold Slashes Guidance, Highlighting Operational and Cost Pressures
Kinross Gold Corporation (KGC) experienced a significant stock decline of 12.7% following a substantial reduction in its 2026 financial guidance and an increase in expected costs. This highlights the challenges faced by mining operations due to environmental factors and operational efficiency.
- What happened: Kinross Gold (KGC) lowered its projected mineral production for 2026 and 2027 from approximately 2 million gold-equivalent ounces to 1.84-1.86 million ounces. This downward revision is attributed to adverse weather impacting operations at La Coipa in Chile and lower mining rates at the Round Mountain asset in Nevada. Concurrently, the company now expects higher attributable all-in sustaining costs (AISC) per gold-equivalent ounce sold, forecast between $1,850 and $1,900 in 2026, up from the initial $1,730 estimate.
- Why it matters: This guidance cut signals significant operational headwinds for Kinross Gold, directly impacting its profitability and future revenue generation. The increased AISC is particularly concerning as it directly eats into margins. The stock's premium valuation to its historical cash flow multiple, trading at 7.2 times operating cash flow versus its five-year average of 6.5, exacerbates the bearish sentiment.
- Second-order effects and who's exposed: This development directly impacts investors in Kinross Gold, as the reduced production and increased costs diminish the company's financial outlook. It also raises questions about the resilience of other gold mining operations to similar environmental and operational challenges. The broader precious metals market could see sentiment affected if this signals a trend of rising costs and declining output in the sector.
- What to watch next: Investors will be closely watching for any signs of operational recovery at La Coipa and Round Mountain, as well as any further cost-containment measures from Kinross. The company's ability to manage these challenges and meet revised production targets will be critical.
3. Merck & Co. Sees Stock Rise on FDA Label Update for Pulmonary Arterial Hypertension Drug
Merck & Co. (MRK) experienced a boost in its stock price following an FDA label update for its drug Winrevair, incorporating positive data from the HYPERION trial for pulmonary arterial hypertension (PAH).
- What happened: Merck's shares rose approximately 1.0% to $149.56 after the FDA approved an expanded label for Winrevair. The update includes data from the HYPERION trial, which demonstrated that Winrevair, when used in addition to background therapy, reduced the risk of clinical worsening by 76% compared to placebo in adults recently diagnosed with PAH. Specifically, the first events occurred in 10.6% of treated patients versus 36.9% for the placebo group. Merck's stock is currently trading at a valuation that is 23.8% above GuruFocus's GF Value estimate of $120.80.
- Why it matters: This FDA label expansion is a significant positive development for Merck. It broadens the potential market for Winrevair and validates its efficacy in a critical patient subgroup. This could lead to increased prescriptions and sales, contributing to Merck's revenue growth and solidifying its position in the PAH treatment landscape.
- Second-order effects and who's exposed: This news directly benefits Merck shareholders and the company's pharmaceutical division. It also has implications for patients suffering from PAH, offering them a potentially more effective treatment option. Competitors in the PAH market may face increased pressure to demonstrate comparable or superior efficacy. The broader healthcare sector, as indicated by the NYSE Healthcare Index advancing 0.9%, continues to show strength, with companies like Eli Lilly and Company (LLY) making substantial investments in manufacturing expansion.
- What to watch next: Investors will monitor the real-world uptake of Winrevair with the expanded label and any subsequent sales performance data from Merck. Further clinical data or pipeline developments for Merck's other therapeutic areas will also be of interest.
4. Amazon Faces New Discrimination Lawsuit, Intensifying Workforce Scrutiny
Amazon.com, Inc. (NASDAQ: AMZN) is embroiled in a new worker lawsuit alleging systematic discrimination against pregnant employees. This development adds to the ongoing scrutiny of Amazon's labor practices and workplace conditions.
- What happened: Four former Amazon warehouse employees have filed a lawsuit, seeking to represent thousands of workers nationwide. They allege that Amazon denied essential accommodations for pregnant employees, such as chairs, breaks, and time off for prenatal appointments, and that pregnant employees were threatened or terminated. Amazon disputes these claims, asserting it provides accommodations and approves nearly all such requests. Similar lawsuits are already underway in New Jersey and New York regarding discrimination against pregnant employees and those with disabilities.
- Why it matters: This lawsuit, if successful or even if it leads to prolonged legal battles and negative publicity, could impose significant financial liabilities on Amazon and further damage its brand reputation. The scale of its workforce (1.58 million employees) means that widespread allegations of discriminatory practices are a substantial risk factor for investors.
- Second-order effects and who's exposed: The primary exposure is for Amazon (AMZN) itself, with potential financial penalties and reputational damage. This also contributes to a broader narrative of challenging working conditions in the logistics and e-commerce sectors. The outcome could influence labor practices across the industry and embolden other groups of employees to pursue legal action. Amazon's decision to block Meta's Muse AI agent also continues to highlight its efforts to control its business ecosystem amidst evolving technological and competitive landscapes.
- What to watch next: The progress of this lawsuit, including any potential class certification and subsequent legal proceedings, will be crucial. Any statements or actions by Amazon in response to the allegations, beyond its initial denial, will also be closely watched. The ongoing legal challenges highlight the importance of Amazon's employee relations and human resources management for its long-term stability.
Other notable developments
- AT&T (ticker: AT) declared a quarterly dividend of $0.2775 per common share, signaling financial health and a commitment to shareholder returns.
- T-Mobile US, Inc. (ticker: TMUS) announced a 15% increase in its cash dividend to $1.17 per share, a positive sign for its shareholders.
- Celanese Corporation (ticker: CE) announced an engineered materials price increase, indicating an effort to pass on costs and improve profitability.
- Stellantis N.V. (ticker: STLA) is preparing to launch extended-range electric vehicles (EREVs) in the U.S. market while recalling over 200,000 Jeep vehicles due to a software glitch.
- Goldman Sachs revised its December Brent crude oil forecast upward to $85 a barrel, citing supply disruptions and inflation expectations, though this implies a retreat from current prices.
- Berkshire Hathaway increased its stake in Lennar Corporation to over 10% with a $212 million purchase.
- Kinross Gold Corporation (KGC) saw its stock drop 12.7% after reducing its 2026 financial guidance and increasing cost projections.
- Etsy (ETSY) shares fell 8.1% amid investor concerns over Meta's Muse AI agent potentially impacting its business model.
- United Therapeutics (UTHR) shares are down 3.8% after Goldman Sachs initiated coverage with a Sell rating.
- UiPath (PATH) shares declined 3.1% following price target reductions from BMO Capital and RBC Capital.
- Akamai Technologies (AKAM) secured an $11.6 billion multi-year agreement with Anthropic to support AI workload demand, with potential for an additional $9 billion.
- Live Oak Acquisition Corp. VI successfully raised $230 million in its Nasdaq IPO.
- Talos Energy (TALO) stock jumped 3%, driven by rising oil prices and the appointment of a new director to its Board.
- Boeing (BA) delivered 418 aircraft through the first eight months of 2026, its highest total for the period since 2018.
- Crocs (CROX) reported Q2 revenue growth but missed EPS guidance, causing its stock to fall 6.8%.
- Newport Associates Development Company awarded $2 million in grants to Jersey City nonprofits to celebrate its 40th anniversary.
- Zscaler appointed Ross Tackett as its new Chief Revenue Officer.
- Ondo Finance, a tokenization platform, was reportedly shopped to potential buyers amidst legal disputes over corporate control following the death of its founder.
- The ProShares Ultra MSCI Brazil Capped ETF (UBR) crossed below its 200-day moving average, indicating a potential technical downturn.
For information, not investment advice. More real-time market insights at www.fortivio.ai.