3. Return Calculation Methodologies
LOS: Discuss TWR, external cash flows, cash
equivalents, expenses/fees.
Time-Weighted Return (TWR)
- Mandate: Must use TWR (removes effect of external
cash flows) unless eligible for Money-Weighted Return (MWR).
- Methodology:
- Large Cash Flows: Must revalue portfolio and
calculate sub-period return on date of flow. (Firm defines
“Large”).
- No Large Cash Flows: Use daily weighted methods
(e.g., Modified Dietz).
- Formula (True TWR): Chain-link sub-period returns. \[R_{TWR} = (1+R_1) \times (1+R_2) \dots -
1\]
Money-Weighted Return (MWR)
- Use when: Firm controls cash flows (closed-end
funds, private equity) OR illiquid assets are dominant.
- Metric: Internal Rate of Return (IRR). Since 2020,
must use daily cash flows.
Treatment of Cash & Expenses
- Cash: Returns from cash/equivalents
must be included in total return (even if custodied
elsewhere or “frictional”).
- Transaction Costs: Returns must be
Net of transaction costs (commissions, spreads).
- Custody fees are NOT transaction costs.
- Bundled Fees: If transaction costs cannot be
separated, deduct the entire bundled fee.