CAGR vs XIRR vs Absolute Return: Which Return Metric Matters When
1. Absolute Return: Simple Capital Appreciation
Absolute Return measures the percentage change between beginning and ending value: ((Final Value - Initial Value) / Initial Value) * 100.
Crucially, Absolute Return ignores time entirely. A 50% absolute return achieved in 1 year represents stellar performance, whereas a 50% absolute return over 10 years represents a sluggish 4.14% annual growth that lags inflation.
Rule: Use Absolute Return only for holding periods of less than one year.
2. CAGR: The Gold Standard for Lumpsum Investments
Compound Annual Growth Rate (CAGR) computes the smoothed annual rate of growth over multiple years: (Final / Initial)^(1 / Years) - 1.
CAGR accounts for compound interest and eliminates the distortions created by short-term market volatility.
Rule: Use CAGR whenever evaluating a single one-time investment held for more than 12 months.
3. XIRR: The Essential Metric for SIPs and Cash Flows
Neither Absolute Return nor CAGR can accurately measure mutual fund SIP performance because an SIP consists of multiple cash inflows occurring on different dates.
Extended Internal Rate of Return (XIRR) assigns an exact timeline and holding period to every individual monthly installment, computing an annualized return across the entire cash-flow schedule.
Rule: Always use XIRR for evaluating SIPs, SWPs, or any portfolio with irregular top-ups and withdrawals.
Summary: When to Use Which Metric
• Holding period under 1 year: Use Absolute Return.
• One-time lumpsum investment over 1+ years: Use CAGR.
• Periodic SIP, top-up, or withdrawal cash flows: Use XIRR.
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