The Motley Fool·2026-01-19 17:30Core Viewpoint - Growth stocks have experienced significant gains, with the S&P 500 Growth Index up over 112% since the start of 2023, outperforming the S&P 500 Value Index [1][2] Group 1: The Trade Desk - The Trade Desk faced challenges in 2025 due to a slow transition to its AI-powered ad-buying platform, Kokai, which alienated some advertisers [4] - Amazon's entry into the ad space has increased competition, potentially pressuring The Trade Desk's pricing and market share [5] - Despite a drop in stock price, The Trade Desk's digital advertising market is expected to grow at 15% annually through 2030, presenting a buying opportunity [7] - The stock is trading around $36, with a market cap of $17 billion and a forward P/E ratio of 17.4, alongside a projected 17% earnings growth for 2026 [8] Group 2: Fortinet - Fortinet's stock has declined about 33% from its peak, attributed to weak firewall sales and disappointing product updates [9][10] - The company anticipates a 12% year-over-year revenue growth, down from 14% in the previous quarter [10] - Transitioning to software products like SASE and SecOps shows promise, with billings in these areas growing 19% and 33% respectively [12] - The stock is priced around $76, with a forward P/E ratio of 26, indicating potential for future growth as software becomes a larger part of its business [13] Group 3: Marvell Technology - Marvell Technology is crucial in AI data centers, with its networking chips and custom AI accelerators driving growth [14] - Reports of Microsoft considering a rival chipmaker for its Maia chip have raised concerns, but demand for AI accelerators remains strong [15] - Marvell is projected to generate $8.2 billion in revenue this year, targeting $10 billion next year, despite potential revenue impacts from competition [15] - The stock is trading around $80, with a forward P/E ratio of 28.4, and expectations for 22% revenue growth and 27% earnings growth next year [18]