- CAGR only works for single one-time lumpsum investments over a known multi-year period.
- XIRR accounts for the exact date and magnitude of every single rupee entering or leaving your portfolio.
- Comparing a 3-year SIP return against a 3-year index CAGR is fundamentally comparing apples to oranges.
- YS Digital Portfolio computes XIRR in real time using root-finding algorithms based on exact transaction ledgers.
1. The Mathematical Limitation of CAGR
CAGR is calculated as: CAGR = (Final Value / Initial Value)^(1 / Years) - 1.
Notice that the formula has only one initial value. If you invest ₹10,000 every month for 5 years, which month's investment is the initial value? Your first installment had 60 months to compound, while your 60th installment had only 1 month to compound. Applying CAGR to the sum of all installments severely underestimates your true compounding velocity.
2. How XIRR Solves the Multi-Cashflow Challenge
Extended Internal Rate of Return (XIRR) is an iterative discount rate that equates the Net Present Value (NPV) of all irregular cash flows to zero.
Every installment date is weighted proportionally. When the market dips and your monthly SIP purchases more units at a lower NAV, XIRR accurately captures the superior returns earned by those specific discounted units.
3. How YS Portfolio Evaluates Your Holdings
In YS Digital Portfolio, both XIRR and Absolute Return metrics are displayed side-by-side for every mutual fund folio and direct equity holding.
This empowers family offices and individual investors to evaluate scheme managers objectively against benchmark indices like Nifty 50 TRI and Nifty Midcap 150 TRI.
Conclusion
Never measure a recurring investment journey with a static lumpsum ruler. Understanding your true XIRR is the key to unlocking realistic financial planning and retirement milestones.
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