Investment Lab
Stocks, cash, regular investing and retirement withdrawals.
Open Investment LabYOUR RESEARCH WORKSPACE
Choose the question.
Open the right lab.
Explore retirement, investing and options with simulations whose assumptions you can inspect.
The free covered call lab needs no account at all. The hosted labs require an active trial or subscription — new here, start with the Investment Lab or RMD & Household Tax Lab.
A payment method is required. You are not charged for 14 days. The trial does not cancel itself — it becomes a paid plan unless you cancel first, which you can do at any time from your account page. How the free trial works, and how to cancel.
Retirement & investing
Household decisions, long-term portfolios and withdrawal rules.
RMD & Household Tax Lab
Compare IRA withdrawals, Roth conversions and modeled household taxes.
Open RMD & Household Tax LabSignal Lab
Does a quarterly target rule protect a portfolio, or just cost return?
Open Signal LabOptions strategies
Explore how strategy rules and market assumptions affect outcomes.
Covered Call Pro
Study shares plus short calls, including rolling and assignment.
Open Covered Call ProCSP / Wheel Pro
Compare cash-secured puts and the full Wheel cycle.
Open CSP / Wheel ProLEAPS Pro
Compare long-dated calls with a stock investment.
Open LEAPS ProPMCC Pro
Study long-dated calls paired with repeated short calls.
Open PMCC ProLEAPS Short-Call Strike Calculator
Use your actual costs and premiums to compare strikes and check whether assignment would recover your net investment. Manual inputs; no API.
Open Strike CalculatorConditional Edge Lab
When does a covered call actually have an edge?
Open Conditional Edge LabMarket analysis
Read the conditions a strategy would have to survive.
Regime Lab
What market state are we probably in, and is it likely to persist?
Open Regime LabYour research workspace
Run your own experiments and keep what you find.
Research Console
Turn a research question into a structured experiment.
Open Research ConsoleResearch Library
Review saved research experiments and results.
Open Research LibraryFinished studies
Completed research with published methods and results. These run free on the research site: open one, change the assumptions and run it again.
Allocation and retirement
All Bills in Retirement
A retiree holds nothing but T-bills at 4%. At what yield does that beat owning the index?
Read the finding and run itTaxes, costs and drag
Dividend Investing After Tax
Does dividend investing outperform a broad-market total-return approach after taxes?
Read the finding and run itTaxes, costs and drag
Covered Calls After Tax
What do covered calls cost you in tax, and does that change the answer?
Read the finding and run itOptions
Covered Calls and Retirement Resilience
Do covered calls make a retirement safer, or just feel safer?
Read the finding and run itOptions
The Wheel
The Wheel has three moving parts. Which of them actually earns anything?
Read the finding and run itOptions
Do Short Calls Really Improve a LEAPS Strategy?
Does adding repeated short calls to a LEAPS position increase ending wealth?
Read the finding and run itDownside protection
Protective Puts in Retirement
Does hedging with a protective put beat simply owning less stock?
Read the finding and run itResearch you can run yourself
The studies on the research site are Mark L. Morrissey’s own, not a reading list of other people’s papers. Each one has a stated question, a frozen protocol and a published finding — and each one is a simulation you can open and run. The assumptions that change the answer are exposed as controls rather than buried, so you can take any study, put your own numbers in the withdrawal rate or the horizon or the seed, and run it again in your browser in about a second. A result you cannot stress is a picture, not a finding.
For example: a retiree holds nothing but T-bills at 4% — at what yield does that beat owning the index? and do covered calls make a retirement safer, or just feel safer?
Build your own investment website
From Simulating Trading and Investment Strategies: Use ChatGPT to Explore Possible Market Outcomes before You Risk Your Money, by Mark L. Morrissey.
The book walks you through putting your own copy of this site online. This is the companion file it asks you to upload: a standalone version of the Investment Lab, yours to host under your own name. The calculations run in the browser, so it needs no account, no subscription and no keys.
Paperback and Kindle. The companion file is free and needs no account.