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PlanningHypothetical

Sequence of returns

Same average return, different order: why the timing of bad years matters

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Hypothetical illustration only. These numbers are estimates based on your inputs and assumptions, could be completely wrong, and are not financial, investment, tax, insurance, legal, real-estate or retirement advice. Past returns don't predict future results. Important disclosures

Assumptions and limitations
  • Uses one real 30-year run of S&P 500 annual returns (or a shuffle of it) with a fixed inflation-adjusted withdrawal; order is the only thing that changes.
  • Every number is hypothetical and depends entirely on what you enter. Small changes in assumptions can change results a lot.
  • Returns are smooth and constant in the single-number projection; real returns vary every year, and real markets can do better or worse than anything shown.
  • Inflation is a single constant rate you choose (except in historical replays, which use the actual CPI of each year).
  • Growth compounds monthly (or at the contribution frequency) and contributions are made at the end of each period.
  • No taxes unless you turn on the simplified tax drag (all positive growth taxed each year at your rate, which overstates tax for buy-and-hold). No fees unless you set one.
  • Inputs stay in your browser. Saving uses this device's local storage; a share link contains the numbers you entered, so anyone with the link can see them.

S&P 500 return presets: Aswath Damodaran (NYU Stern), Historical Returns on Stocks, Bonds, Bills, Real Estate and Gold (histretSP.xls), annual S&P 500 total returns with dividends 1928-2025, compound (geometric) averages; inflation from the CPI-U (FRED CPIAUCNS) in the same file.

Historical monthly sequences: Robert J. Shiller, U.S. Stock Markets 1871-Present (ie_data.xls, shillerdata.com), monthly S&P Composite with dividends and CPI, Feb 1871 to Sep 2024. Shiller's monthly prices are averages of daily closes, which smooths month-to-month swings.

Coteau may be wrong. Check every number yourself, and talk to a licensed professional before acting on anything.

Coteau Planning tools are educational calculators. Coteau is not a registered investment adviser, broker-dealer, financial planner, tax professional or insurance agent, doesn't manage money, and doesn't sell or recommend any product. Talk to a licensed professional before making decisions. Not investment advice · Important disclosures

Generated · Coteau Planning · Hypothetical illustration only, not advice · coteau.app/legal/disclaimer

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Independent research · Not investment advice · Important disclosures · Contact desk@coteau.app

Coteau Systematic Strategies publishes stock research and model portfolios. Results are hypothetical unless marked Live. Data: Yahoo Finance (15-min delayed), SEC EDGAR and the House Clerk.

Beta 0.9 · Oct 21, 2026