Comparing SIP and lumpsum fairly requires investing the same total amount. SIP spreads risk through rupee cost averaging; lumpsum deploys full capital from day one.
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Lumpsum wins in steadily rising markets — capital is fully invested from day one. SIP wins in volatile or falling-then-rising markets by averaging purchase cost. At identical assumed returns, lumpsum always produces a larger mathematical result.
Uses the same assumed return for both. Real outcomes depend on when exactly you invest. See our full disclaimer.