Plan-and-Risk-Budget Investing
Choose a tolerable risk budget, follow one plan, and resist emotional switching
- Difficulty
- Advanced
- Time to result
- ~ongoing to results
- Steps
- 6
- Confidence
- 96%
Plan-and-Risk-Budget Investing rejects the search for a universally superior investment product or style. The investor starts with goals, time horizon, liquidity needs, and a risk budget that can be maintained during severe volatility. A coherent approach—such as value, growth, passive funds, ETFs, or mutual funds—is then selected and expressed as a written plan with allocation, rebalancing, and review rules. Market news and competing philosophies are filtered through that plan rather than triggering immediate changes. The mechanism is behavioral: a suitable risk budget reduces the chance of selling in fear, while consistent rules prevent performance chasing. Over long periods, maintaining a workable strategy allows compounding to matter more than predicting each market move.
Origin
Extracted from Masters in Business during Ron Carson's discussion of the investment lesson he learned after experimenting with commodity futures.
Core principles
- 01No investment philosophy is a universal silver bullet
- 02Several sound styles can succeed when followed consistently
- 03Risk must be tolerable enough to prevent panic decisions
- 04Behavior matters more than short-term market forecasts
- 05Switching strategies at emotional extremes destroys compounding
How to run it
- 1
Define the destination
Specify the financial objective, required capital, time horizon, liquidity needs, and acceptable range of outcomes.
Pro tip Express goals in dates and currency amounts.
Watch out A portfolio cannot be judged without knowing what it is intended to accomplish.
- 2
Set the risk budget
Choose a level of volatility and potential loss that the investor can financially and emotionally sustain.
Pro tip Test the budget against a severe historical decline before committing.
Watch out A mathematically optimal portfolio fails if panic causes the investor to abandon it.
- 3
Choose a coherent philosophy
Select an evidence-based investment style that fits the goal and risk budget rather than searching for a perfect strategy.
Pro tip Favor an approach that can be clearly explained and maintained.
Watch out Do not combine incompatible strategies merely to follow current trends.
- 4
Write the operating rules
Document allocation ranges, contribution rules, rebalancing triggers, and the limited conditions that justify changing the plan.
Pro tip Create the rules before the next market shock.
Watch out Rules invented during stress often rationalize emotional action.
- 5
Filter market noise
Compare every proposed move with the written plan and reject changes driven only by headlines, politics, or recent performance.
Pro tip Use a waiting period before making non-routine changes.
Watch out Going to cash after a decline can turn temporary volatility into permanent loss.
- 6
Review without chasing
Assess progress at predetermined intervals and revise only when goals, circumstances, or risk capacity materially change.
Pro tip Review goal progress separately from short-term benchmark rankings.
Watch out Frequent strategy switching interrupts compounding and encourages buying high and selling low.
In the wild
An investor sees the COVID decline and believes the economy may not recover for years. Instead of moving to cash, the investor checks the written plan, confirms that the portfolio remains within the established risk budget, rebalances as specified, and maintains the strategy.
→ The investor participates in the subsequent market recovery rather than locking in the decline.
An investor alternates between value, growth, and passive investing whenever a new book or recent performance makes another style look superior. The investor instead selects one diversified approach suited to the goal, documents rebalancing rules, and limits reviews to a fixed schedule.
→ Emotional switching declines and the portfolio can compound under a consistent process.
Common mistakes
Searching for a silver bullet
The search encourages investors to abandon workable methods whenever another philosophy appears more attractive.
Setting an intolerable risk budget
Excessive risk makes emotional selling more likely precisely when markets are under the greatest pressure.
Treating headlines as plan changes
Political events, crises, and forecasts can feel urgent without materially altering the investor's long-term objective.
Is it for you?
Best for
Long-term investors who repeatedly become distracted by forecasts, market narratives, or newly popular strategies.
Not ideal for
Short-term traders or investors whose liquidity needs make sustained exposure to market volatility inappropriate.
From the transcript
“most people are trying to find a silver bullet of investing and they're just it doesn't exist.”
“the silver bullet is is that if you stick to a plan and you get your risk budget right, you can be successful with deep…”
“investor behavior will dictate your success, not what the market does”
From the episode
Ron Carson on Financial Advisers' Trust (Podcast)