Glossary term
Money-Weighted Rate of Return (MWRR)
Money-weighted rate of return measures investment performance while reflecting the size and timing of cash flows into and out of the portfolio.
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What Is Money-Weighted Rate of Return?
Money-weighted rate of return, or MWRR, measures investment performance while reflecting the size and timing of cash flows into and out of the portfolio. It is closely related to internal rate of return because it finds the rate that links contributions, withdrawals, and ending value.
MWRR can differ sharply from time-weighted return. That difference matters because investor cash-flow decisions can raise or lower the measured return depending on when money was added or withdrawn.
Key Takeaways
- MWRR incorporates the timing and size of cash flows.
- It is useful for measuring an investor's actual experience when they control contributions and withdrawals.
- It can be higher or lower than time-weighted return because cash flows affect the result.
- Time-weighted return is often better for evaluating a manager who does not control client cash flows.
- MWRR is most meaningful when the cash-flow pattern is part of the decision being evaluated.
How MWRR Works
MWRR is the discount rate that makes the present value of cash flows and ending value balance. In simplified form, it solves for r in a cash-flow equation.
CFt represents the cash flow at time t, including contributions, withdrawals, and ending value depending on sign convention. r is the money-weighted return. n is the final period in the measurement horizon.
MWRR Compared With Time-Weighted Return
Return Measure | What It Emphasizes | Best Used For |
|---|---|---|
MWRR | Investor experience including cash-flow timing | Personal portfolios, private investments, capital calls |
Time-weighted return | Performance excluding external cash-flow timing | Manager comparison and strategy performance |
Simple return | Beginning and ending value only | Quick estimates without complex cash flows |
Cash Timing and Interpretation
If an investor adds a large amount right before strong performance, MWRR may look better than the portfolio's time-weighted return. If they add right before a decline, MWRR may look worse. That does not make MWRR wrong; it means the metric is reflecting the investor's actual dollar-weighted experience.
MWRR is especially relevant for private equity, real estate funds, venture funds, and personal accounts where contributions and withdrawals are central to the result.
Investor Experience
MWRR is especially useful when the question is what an investor actually experienced after deposits and withdrawals. Two investors can hold the same fund over the same calendar period and report different money-weighted returns if one added money before a rally and the other added money before a decline.
That makes MWRR practical for personal portfolios, private investments, and accounts with irregular cash flows. It is less useful for judging whether the manager made good investment decisions, because the manager usually does not control when the investor contributes or withdraws capital.
Where It Shows Up
Money-weighted return often appears in private equity, real estate partnerships, venture funds, separately managed accounts, and household portfolios with deposits and withdrawals. In those settings, the timing of capital is part of the economic result. A dollar invested for five years should not receive the same weight as a dollar invested for five days.
The same feature makes MWRR easy to misread in manager comparisons. A weak money-weighted return may reflect poor investor timing rather than poor security selection. A strong one may reflect fortunate contribution timing rather than repeatable skill.
Sign convention should be handled consistently. Contributions, withdrawals, beginning value, and ending value must be entered from one viewpoint, or the internal-rate-of-return calculation can produce a misleading answer. The math is mechanical; the interpretation depends on clean cash-flow data.
The Bottom Line
Money-weighted rate of return measures return with cash-flow timing included. It is useful for understanding an investor's lived result, but it should not be confused with a manager's pure investment performance when the manager did not control the cash flows.