Definition
Lump Sum vs SIP
Lump sum versus SIP is the question of whether to invest a large amount all at once or to spread it across regular instalments.
Mathematically, if you already have a large sum and markets tend to rise over time, investing the lump sum immediately usually earns more on average, because your money is exposed to growth sooner. Spreading it out (often via an STP from a liquid fund) sacrifices some expected return for protection against the bad luck of investing right before a crash.
In practice the choice is as much behavioural as mathematical: a phased approach reduces regret if markets fall just after you invest, and is gentler on nerves. For ongoing monthly income, the SIP wins by default; for a windfall, weigh expected return against your tolerance for short-term regret, perhaps phasing a large sum over a few months.
Related terms
- Loss AversionLoss aversion is the well-documented tendency for the pain of a loss to feel roughly twice as powerful as the pleasure of an equivalent gain.
- Rupee Cost AveragingRupee cost averaging is the practice of investing a fixed amount at regular intervals, so you automatically buy more units when prices are low and fewer when prices are high.
- Step-up SIPA step-up SIP automatically increases your periodic investment amount at set intervals, aligning contributions with rising income and accelerating wealth accumulation.
Plain-English explainer from The Dispatch Investors Encyclopedia. General information, not financial advice.