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Website title: CXO Advisory - Stock Market Research and Investing Strategies

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Reassessing Use of Machine Learning in Stock Portfolio Construction [PREMIUM]
Are the conclusions of recent studies that machine learning models can materially boost risk-adjusted stock portfolio performance reliable? In their May 2026 preliminary paper entitled “All Sizzle, No Steak! How Robust Are Financial Machine Learning Results Really?”, Kristian-Alexander Janisch, Johannes Dreyer, Fuad Mehraliyev and Kristian Sund retest elastic net and neural netw...

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AI Panel Projections of AI Platform Revenue/Profit [PREMIUM]
Is the evolving set of artificial intelligence (AI) platforms based on large language models interesting as niche fundamental analysts? Are they monolithic, or diverse? As a simple exploration, we pose to each of Grok, ChatGPT, Claude, Perplexity and Gemini the following two prompts regarding projected aggregate revenue and net profit for major AI platforms: ......

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AI Firms Faking It? [PREMIUM]
Do the record market capitalizations of firms focused on artificial intelligence (AI) reasonably reflect future profit growth, after accounting for huge investments in data centers and ongoing costs to train and deploy AI models? In his May 2026 paper entitled “Valuation and Accounting Issues in the AI Ecosystem”, Andreas Haaker examines valuation and accounting problems...... <...

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Historical U.S. Equity Returns for a 5-Year Horizon [PREMIUM]
A subscriber asked about the historical experience (distribution of outcomes) of an investor with a 5-year horizon (holding period). To investigate we consider returns for 5-year intervals rolled annually at the end of each calendar year based on: Annual nominal and real total returns for Shiller’s long-run S&P Composite Index during 1871-2025, offering 149... Keep...

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Weekly Summary of Research Findings: 5/26/26 – 5/29/26 [PREMIUM]
Below is a weekly summary of our research findings for 5/26/26 through 5/29/26. These summaries give you a quick snapshot of our content the past week so that you can quickly decide what’s relevant to your investing needs. Subscribers: To receive these weekly digests via email, click here to sign up for our mailing list.......

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