Step 12
Level: intermediate
Time-weighted return measures investment strategy performance, while money-weighted return measures the investor's actual experience according to cash inflows and outflows. If measured incorrectly, investors can easily reward lucky decisions and punish correct decisions but encounter an unfavorable environment.
TWR eliminates the impact of deposit and withdrawal timing, making it suitable for evaluating managers or strategies. MWR is influenced by cash flow timing, which is relevant for understanding how much an investor is actually earning. The two numbers can be very different when investors deposit a lot of money before the decline or withdraw money before the recovery. A single return number is not enough to conclude whether a strategy is good or bad.
By knowing where the returns came from, what risks were taken, and whether the results exceeded the benchmark, investors can improve the process instead of just reacting to the final result.
Time-weighted return measures investment strategy performance, while money-weighted return measures the investor's actual experience according to cash inflows and outflows.
Measuring performance is not just about showing off results. The goal is to understand whether the strategy worked as expected, whether the risk was worth it, and whether the results came from skill, environment, or luck. A portfolio with high returns but too much risk may not be as good as a more stable portfolio with lower returns and suitable for your goals.
TWR eliminates the impact of deposit and withdrawal timing, making it suitable for evaluating managers or strategies. MWR is influenced by cash flow timing, which is relevant for understanding how much an investor is actually earning. The two numbers can be very different when investors deposit a lot of money before the decline or withdraw money before the recovery.
A performance metric always has a range of uses. CAGR does not indicate drawdown. Sharpe does not see all tail risks. The wrong benchmark leads to wrong conclusions. Attribution requires sufficiently good data. So use multiple complementary metrics instead of finding a single number to represent the entire quality of an investment.
Use TWR to evaluate strategy quality, use MWR to evaluate individual results of actual cash flows.
During each review period, record the absolute return, return relative to the benchmark, drawdown, volatility and main drivers of performance. This helps you distinguish strategic issues from short-term noise, and detect early when the portfolio deviates from its original goals.
Evaluate strategies by individual results without separating the impact of deposit and withdrawal timing.
A common mistake is to measure results in the way that is most favorable to the story you want to believe. Serious investors need to accept consistent metrics, appropriate benchmarks, and long enough data. Good measurement does not make the results better, but it makes the lessons clearer.
Performance eliminates the impact of external deposits and withdrawals.
Performance takes into account the size and timing of the investor's cash flow.
Funds added to or withdrawn from the portfolio during the measurement period.
There are measures of absolute returns, risk-adjusted returns, benchmark-relative returns, drawdowns, and return attribution.
Some metrics are used to compare strategies, some are used to understand investor experience, some are used to check risk.
Performance metrics depend on data quality, measurement period length, and benchmark suitability.
Application in performance measurement
A fund has a positive TWR for the year, but an individual investor still has a negative MWR if most of the money is deposited right before a sharp decline in the fund.
Risk performance analysis
Evaluate strategies by individual results without separating the impact of deposit and withdrawal timing. This causes investors to draw the wrong lesson and can increase risks in the next cycle.
Changing the start or end date for better results compromises the integrity of the review.
Inappropriate benchmarking makes a portfolio appear better or worse than it actually is.
Evaluate strategies by individual results without separating the impact of deposit and withdrawal timing. Returns are only meaningful when accompanied by volatility, drawdown, liquidity and targets.
Exercise 1 - reflection
Take portfolio results for the most recent 12 months and analyze them from a time-weighted vs money-weighted return perspective.
Exercise 2 - case_study
A fund has a positive TWR for the year, but an individual investor still has a negative MWR if most of the money is deposited right before a sharp decline in the fund. Identify the correct conclusion, the likely wrong conclusion, and the additional data needed.
Exercise 3 - action_plan
Create a performance review sheet of 5 metrics you will track each quarter.