Recent Investing Research

Is the evolving set of artificial intelligence (AI) platforms based on large language models interesting as equity factor selection advisors? Are they monolithic, or diverse? As a simple exploration, we pose to each of Grok, ChatGPT, Claude, Perplexity and Gemini the following prompt regarding 13 factor-related categories of exchange-traded funds (ETF) from the list in… Keep Reading

Are low volatility stock strategies, as implemented by exchange-traded funds (ETF), attractive? To investigate, we consider eight of the largest low volatility ETFs, all currently available, in order of longest to shortest available histories: Invesco S&P 500 Low Volatility Portfolio (SPLV) – the 100 stocks from the S&P 500 Index with the lowest realized volatility over the… Keep Reading

Is the evolving set of artificial intelligence (AI) platforms based on large language models interesting as asset class allocation advisors? 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 the 12 asset class exchange-traded funds (ETF) considered in the… Keep Reading

Below is a weekly summary of our research findings for 6/1/26 through 6/5/26. 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.

Is the evolving set of artificial intelligence (AI) platforms based on large language models interesting as economic forecasters? Are they monolithic, or diverse? As a simple exploration, we pose to each of Grok, ChatGPT, Claude, Perplexity and Gemini the following prompt regarding the 12-month trailing U.S. consumer inflation rate over the next 12 months: Applying… Keep Reading

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 network models as applied… Keep Reading

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: Applying… Keep Reading

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… Keep Reading

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 overlapping… Keep Reading

We have updated monthly allocations and performance data for the Simple Asset Class ETF Momentum Strategy (SACEMS) and the Simple Asset Class ETF Value Strategy (SACEVS). We have also updated performance data for the Combined Value-Momentum Strategy. We have updated the Trading Calendar to incorporate data for May 2026.

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.

The home page, Simple Asset Class ETF Momentum Strategy (SACEMS) and Simple Asset Class ETF Value Strategy (SACEVS) now show preliminary positions for June 2026. SACEMS rankings probably will not change by the close. SACEVS allocations are unlikely to change by the close.