Investing Research Articles

Does bitcoin now behave like a conventional financial asset? In their short November 2025 paper entitled “From Time-Series Momentum to Size-Factor Comovement: Bitcoin’s Continuing Evolution as a Financial Asset”, Samuel Rosen and Hongcheng Wang investigate the evolution of bitcoin. Specifically, they: Perform autoregressions of weekly bitcoin returns to evaluate time-series momentum at horizons of one… Keep Reading

Can a large language model (LLM) applied to social media data catalog the strategy choices, sentiment and trading behavior of retail investors? In the November 2025 revision of their paper entitled “Wisdom or Whims? Decoding Retail Strategies with Social Media and AI”, Shuaiyu Chen, Lin Peng and Dexin Zhou apply GPT-4 Turbo and BERT to… 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 November 2025.

Below is a weekly summary of our research findings for 11/24/25 through 11/28/25. 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 December 2025. SACEMS rankings are very close for ranks 3 and 4, which could flip by the close. SACEVS allocations are unlikely to change by the close.

“Nixed: The Upside of Getting Dumped”, flagged by a subscriber, finds that “index deletions…could add an abnormal upside to a portfolio when the current growth-dominated bubble starts to deflate.” The authors have quantified findings as the Research Affiliates Deletions Index (NIXT), constructed by: Starting with deletions due to market capitalization changes from the 500 and… Keep Reading

How do exchange-traded-funds (ETF) focused on Treasury Inflation-Protected Securities (TIPS) perform? To investigate, we consider ten of the largest TIP ETFs, all currently available, as follows: iShares TIPS (TIP) Schwab U.S. TIPS (SCHP) Vanguard Short-Term Inflation-Protected Securities (VTIP) iShares 0-5 Year TIPS (STIP) SPDR Portfolio TIPS (SPIP) FlexShares iBoxx 3-Year Target Duration TIPS Index (TDTT)… Keep Reading

Do analysts/investors predictably and exploitably misinterpret tones of earnings calls? In their October 2025 paper entitled “Do Investors Get It Right? Reaction Bias to Earnings Calls”, Zhenzhen Fan and Fred Liu study interactions between textual information in earnings conference calls and analyst revisions to their next-quarter earnings forecasts. Specifically, they: For each stock and each… Keep Reading

Do informed put option buyers predict overall U.S. stock market returns? In her November 2025 paper entitled “Put Option Trading Efficiency”, Xiaolin Huo constructs a monthly Put Option Trading Efficiency (POTE) variable to measure the extent to which speculators hold larger put option positions on overpriced stocks than underpriced stocks. She measures POTE monthly as… Keep Reading

Below is a weekly summary of our research findings for 11/17/25 through 11/21/25. 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.