What happens when investors largely ignore their stock holdings over intervals of one, five and ten years? In his June 2026 paper entitled “Returns to ‘Do-Nothing’ Portfolios”, Hendrik Bessembinder studies returns to “do-nothing” portfolios constructed...

Below is a weekly summary of our research findings for 7/13/26 through 7/17/26. These summaries give you a quick snapshot of our content the past week so that you can quickly decide what’s relevant to...

Is the evolving set of artificial intelligence (AI) platforms based on large language models interesting for selection of stocks that are deeply undervalued? Are they monolithic, or diverse? As a simple exploration, we pose to...

The 2024 S&P Indices Versus Active (SPIVA) Scorecard finds that a supermajority of active U.S. funds underperform respective benchmarks. Is that finding representative of investor experience? In the May 2026 draft of their paper entitled...

What do the latest S&P Indices Versus Active (SPIVA) Scorecards say about active management investing expertise? In the “SPIVA U.S. Year-End 2025” Scorecard, Anu Ganti, Davide Di Gioia, Nick Didio and Liam Flaherty review the...

The Inflation Forecast now incorporates actual total and core Consumer Price Index (CPI) data for June 2026. The actual total (core) inflation rate is lower than (lower than) forecasted.

Can artificial intelligence (AI) in the form of large language models (LLM) improve upon existing methods to explain stock returns around earnings announcements? In the June 2026 version of their paper entitled “Assessing the Benefits...

How should investors think about active exchange-traded funds (ETF)? In their February 2026 paper entitled “The Fast-Growing Market of Active ETFs”, Rachel Li and Nadia Winn review the state of active ETFs. They consider only...

Below is a weekly summary of our research findings for 7/6/26 through 7/10/26. These summaries give you a quick snapshot of our content the past week so that you can quickly decide what’s relevant to...

Under what conditions does equity market time series momentum (TSMOM) work and not work? In their June 2026 paper entitled “Boundaries of Time Series Momentum”, Matti Suominen and Erik Hjalmarsson examine performance of equity market...

Has the strong shift in investor flows from active funds to passive funds unexpectedly contributed to a decline in performance of the former? In her June 2026 paper entitled “Passive Flows, Active Woes: Passive Investing...

Considerable research investigates investor disagreement, measured with very different observable metrics (proxies), as an asset return predictor. Is this research coherent? In their June 2026 paper entitled “Measuring Investor Disagreement: Proxies, Pitfalls, and a Path...

Can large language models (LLM) simulate market-scale, real-time business sentiment from the Chief Financial Officer (CFO) perspective? In their June 2026 paper entitled “CFOs Meet LLMs”, John Graham, Campbell Harvey and Manish Jha use an...

Is the evolving set of artificial intelligence (AI) platforms based on large language models interesting as a recommender of investment managers/advisors? Are they monolithic, or diverse? As a simple exploration, we pose to each of...

Below is a weekly summary of our research findings for 6/29/26 through 7/2/26. These summaries give you a quick snapshot of our content the past week so that you can quickly decide what’s relevant to...

What does a passive U.S. equity investor keep after paying federal taxes? In the May 2026 version of his paper entitled “Uncle Sam’s Cut: A Century of the Federal Tax Drag on US Equity Returns”,...

The conventional Cyclically Adjusted Price-Earnings ratio (CAPE), or P/E10, divides current real S&P 500 Index level by average annual aggregate real index earnings as reported over the prior 10 years. Is there a more useful...

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...

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

Are stock market dips reliable indications of valuation distortions that reliably revert, thereby offering buying opportunities? In his May 2026 paper entitled “Buy the Dip? Not So Fast”, Javier Estrada considers two ways to evaluate...

Do U.S. industry portfolios perform predictably after similar U.S. equity market returns? In his May 2026 paper entitled “Industry Rotation Using Market-State Similarity”,  Valeriy Zakamulin studies whether current market returns exploitably predict subsequent industry returns....

Below is a weekly summary of our research findings for 6/22/26 through 6/26/26. These summaries give you a quick snapshot of our content the past week so that you can quickly decide what’s relevant to...

A subscriber commented and asked: “I have been wondering whether Morningstar’s estimate of ‘fair value’ for stocks has any relationship to actual subsequent returns. For instance, when the fair value is more than double the...

Is the evolving set of artificial intelligence (AI) platforms based on large language models interesting as retirement portfolio specification advisors? Are they monolithic, or diverse? As a simple exploration, we pose to each of Grok,...

Is the Buffett Indicator, the ratio of total U.S. stock market capitalization (proxied by Wilshire 5000 Total Market Index W5000) to U.S. Gross Domestic Product (GDP), a useful indicator of future U.S. stock market performance? W5000/GDP...