Stocks making the biggest moves midday: CSX, Electronic Arts, Pony AI, Merus & more

Midday trading saw significant M&A-driven activity, with Merus surging 36% on an $8 billion acquisition by Genmab and Electronic Arts rising 4.8% on a $55 billion take-private deal. Cannabis stocks, including the MSOS ETF, jumped over 20% following President Trump's social media comments, while CSX gained 3% after naming a new CEO amid activist pressure. Positive analyst coverage boosted Pony AI by 9% and AppLovin by 8.2%, whereas Oracle dipped on AI trade sustainability concerns and Intel pulled back 2% after its recent rally.

Analysis

Midday trading activity was heavily influenced by M&A, analyst actions, and specific sector catalysts, creating significant dispersion in stock performance. In the M&A space, biotech firm Merus (MRUS) surged 36% upon agreeing to an $8 billion cash acquisition by Genmab, while Electronic Arts (EA) rose 4.8% after a consortium confirmed a $55 billion deal to take the company private. Corporate governance also played a role, with railroad operator CSX gaining over 3% following the appointment of a new CEO under pressure from activist investor Ancora Holdings. Analyst upgrades and initiations provided substantial lifts, as seen in Pony AI's (PONY) 9% jump on a new Citi 'buy' rating and AppLovin's (APP) 8.2% increase after a significant Morgan Stanley price target hike tied to a forthcoming non-gaming ad platform. The semiconductor equipment sector saw gains, with Lam Research (LRCX) climbing nearly 3% on a Deutsche Bank upgrade. Conversely, technical factors and sentiment shifts are pressuring some technology stocks; Intel (INTC) declined 2% from an overbought position after an 80% year-to-date run, and Oracle (ORCL) continued its slide, falling nearly 1% amid investor questions over the sustainability of the AI trade. Finally, the cannabis sector demonstrated extreme sensitivity to political rhetoric, with the MSOS ETF soaring 20% after comments from President Donald Trump.

Key Decisions for Investors

• Investors in Merus (MRUS) should consider the significant time horizon and potential regulatory risk associated with the acquisition's expected close in Q1 2026, despite the substantial premium offered.
• For AppLovin (APP), the performance of its new self-serve, non-gaming ad tool launching on October 1st is a critical upcoming catalyst that will test the validity of Morgan Stanley's bullish price target.
• Traders should be cautious with Intel (INTC) in the near term, as its Relative Strength Index of 80 indicates an overbought condition, making it vulnerable to a pullback or profit-taking.
• The weakness in Oracle (ORCL) amidst broader AI enthusiasm suggests investors should closely scrutinize the company's competitive positioning and the specific drivers of its AI revenue streams.
• Given the extreme volatility in cannabis stocks like MSOS and ACB, positions should be sized according to high-risk tolerance, as the sector's performance is heavily tied to unpredictable political news flow rather than fundamentals.
• The activist-driven CEO change at CSX signals a potential for strategic shifts; investors should monitor for forthcoming announcements related to efficiency initiatives or M&A activity.