Learn what the money-weighted rate of return measures, why it is closely related to IRR, and when it is more informative than a simple holding-period return.
The money-weighted rate of return (MWRR) measures investment performance while taking into account the timing and size of contributions, withdrawals, and distributions.
It answers a practical investor question:
“What return did this sequence of actual cash flows produce for the investor?”
The measure is “money-weighted” because periods with larger invested dollars have more influence on the result than periods with smaller invested dollars.
That means the investor’s own timing decisions matter.
If more money is added right before a bad period, the MWRR will usually suffer more than a measure that ignores cash-flow timing.
MWRR is closely related to internal rate of return (IRR).
In many practical settings, the money-weighted rate of return is effectively the IRR of the investor’s cash flows.
The rate is the discount rate that sets the net present value of all cash flows equal to zero:
Where the cash flows include:
MWRR is useful when you want to evaluate the actual investor experience, not just the performance of the underlying asset manager or portfolio before external cash-flow decisions.
That is why it is common in:
A rate of return based only on beginning and ending value can miss the effect of contributions and withdrawals that happened in between.
MWRR captures those timing effects directly.
Suppose an investor:
$10,000 at the start$5,000 halfway through the year$16,200The simple change in value alone does not tell the full story because more money was invested during the period.
MWRR is the rate that correctly reflects the timing of those dollars, not just the final balance.
Net internal rate of return goes one step further by reflecting fees, carried interest, or other deductions.
MWRR describes the timing-sensitive return logic itself. Net IRR tightens it to the investor’s after-fee experience.