Capital Markets–Investor Partnership
Close expected-return gaps with saving and spending—not unsupported risk
- Difficulty
- Moderate
- Time to result
- ~months to results
- Steps
- 6
- Confidence
- 95%
The Capital Markets–Investor Partnership treats financial success as the combined output of market returns and the investor's own contributions and consumption choices. When expected returns are high, markets may perform much of the funding work. When forward returns are muted, the investor must compensate through higher savings, lower spending, a longer working life, or reduced retirement income. The method begins with realistic nominal forecasts, then subtracts inflation, taxes, fees, and other friction to estimate usable real returns. It explicitly rejects solving every shortfall by adding portfolio risk or reaching for unavailable yield. The resulting plan assigns the market only the work it can reasonably be expected to perform and closes the remaining gap with controllable personal decisions.
Origin
Extracted from Masters in Business, where Fran Kinniry described total return as a partnership between capital markets and the investor during a discussion of muted future returns.
Core principles
- 01Treat market returns as only one contributor to financial outcomes
- 02Base plans on realistic forward-looking returns
- 03Increase personal contributions when market contributions fall
- 04Evaluate returns after fees, taxes, and inflation
- 05Use saving, spending, and working time as controllable levers
How to run it
- 1
Forecast market contributions
Estimate plausible long-term nominal returns for the portfolio's asset classes rather than extrapolating an exceptional historical period.
Pro tip Use ranges and multiple scenarios instead of one precise forecast.
Watch out Recent high returns can create unrealistic expectations.
- 2
Convert nominal returns to usable returns
Subtract inflation, taxes, fees, and other friction to estimate the real return available for future spending or gifting.
Pro tip Model taxable and tax-advantaged accounts separately when material.
Watch out A high nominal return can still produce a modest real outcome.
- 3
Measure the funding gap
Compare projected portfolio growth and contributions with the capital required for the desired future income or goal.
Pro tip Test longevity and poor-return scenarios as well as the base case.
Watch out Do not hide a shortfall behind optimistic assumptions.
- 4
Adjust investor-controlled inputs
Increase saving, reduce current or future spending, or improve tax and fee efficiency.
Pro tip Prioritize recurring automatic changes over occasional heroic contributions.
Watch out Taking more investment risk is not a substitute for an affordable plan.
- 5
Adjust the timeline or output
If the gap remains, consider working longer, delaying the goal, or accepting a lower retirement-income stream.
Pro tip Show the effect of each lever separately so the investor can make an informed tradeoff.
Watch out Avoid assuming that markets will rescue an underfunded plan.
- 6
Automate and review
Use automatic enrollment, saving escalation, employer matches, and periodic reviews to keep the investor's side of the partnership on track.
Pro tip Increase automatic contributions when income rises.
Watch out A static contribution rate may become inadequate as assumptions and circumstances change.
In the wild
A saver built a retirement plan around the unusually strong stock and bond returns experienced by an earlier generation. Revised estimates imply a much lower real return. Rather than loading the portfolio with speculative assets, the saver increases automatic contributions, plans to work two additional years, and slightly reduces the target retirement income.
→ The plan becomes fundable without relying on exceptional market performance.
A new employee starts with a manageable retirement contribution, captures the employer match, and schedules annual increases. These behavioral contributions compensate for a muted expected return environment without requiring frequent investment decisions.
→ The employee steadily raises the probability of meeting the retirement goal.
Common mistakes
Extrapolating a golden era
The investor assumes the exceptional stock and bond returns of past decades will persist indefinitely.
Ignoring real returns
Planning from nominal returns without deducting inflation, taxes, and friction overstates future purchasing power.
Making markets do all the work
The plan avoids saving or spending adjustments and instead relies on higher risk to close the funding gap.
Is it for you?
Best for
It is best for savers and retirees facing lower expected returns than previous generations experienced.
Not ideal for
It is not ideal for plans whose liabilities are already fully funded and insensitive to future market returns.
From the transcript
“The way I've always looked at total return is it's a partnership between the capital markets and the investor in themselves.”
“the partnership is going to have to come more from saving more, spending less, and making sure that you're doing your end of the bargain…”
“you have to think about real returns, meaning after test, after tax, and after inflation.”
From the episode
Fran Kinniry Discusses Diversified Portfolios
Fran Kinniry