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Featured
Where the evidence points.
Most Individual Stocks Lose to Treasury Bills
Bessembinder tracked 25,967 US stocks from 1926 to 2016. Only 42.6% beat one-month T-bills over their lifetime.
ResearchHow Often Active Funds Beat the Index
The SPIVA Scorecard has tracked this for 25 years. In 2025, 79% of active large-cap US funds underperformed the S&P 500.
Case StudyCase Study: 66,465 Households at a Discount Broker
Barber and Odean matched trading records to returns from 1991 to 1996. The most active traders earned 11.4% while the market returned 17.9%.
ResearchHow Many Stocks Make a Diversified Portfolio
Textbooks say 10 or 20. Statman said 30 or 40. Campbell and his co-authors, 50. The number keeps rising, and the reason is interesting.
Library
Resource library.
A map of the platform before you touch it: what each screen answers, and which question it does not.
What a Stock Actually IsInvestingBefore probabilities and portfolios: what you own when you buy a share, and where the return comes from.
How to Read the Probability CardUsing ATLASThe main screen in ATLAS, explained field by field: the big percentage, the band, the horizon and the confidence label.
Most Individual Stocks Lose to Treasury BillsResearchBessembinder tracked 25,967 US stocks from 1926 to 2016. Only 42.6% beat one-month T-bills over their lifetime.
Saving Before InvestingInvestingThe month-by-month habit that decides more of the outcome than any stock pick: how much goes out before anything goes in.
Using the Portfolio BuilderUsing ATLASFrom an amount and a few constraints to a weighted basket, and how to argue with the result instead of accepting it.
How Often Active Funds Beat the IndexResearchThe SPIVA Scorecard has tracked this for 25 years. In 2025, 79% of active large-cap US funds underperformed the S&P 500.
Compounding, and Why Time Beats TimingInvestingThe arithmetic that makes early, boring contributions outperform late, clever ones.
The Risk Screen, Step by StepUsing ATLASVolatility, beta, correlation, drawdown and scenarios: what to look at first and what each number should change in your decision.
Case Study: 66,465 Households at a Discount BrokerCase StudyBarber and Odean matched trading records to returns from 1991 to 1996. The most active traders earned 11.4% while the market returned 17.9%.
Your First PortfolioInvestingWhat to decide, in what order, the first time you put money into the market.
ATLAS Recovery: When You Are Already DownUsing ATLASThe screen that answers the least comfortable question in investing: what is the probability of getting back to my buy price?
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