Standard SIP is Dollar (Rupee) Cost Averaging — fixed amount monthly, regardless of market level. Value Averaging (VA) is the lesser-known variant — variable amount each month to hit a target corpus path. VA outperforms DCA in backtests but loses on behavioural simplicity. This guide picks the right one for you.
The two strategies
DCA (Standard SIP)
Fixed ₹10,000/month. Buy more units when market falls (NAV down), fewer when rises. Set-and-forget. Doesn't require active decisions.
Value Averaging
Target corpus path: e.g., grow corpus by ₹10,000 per month. If market drops and corpus is below path, invest more to catch up. If market rises and corpus exceeds path, invest less (or sell). Forces buying low + selling high.
Worked example — Year 1: Target corpus by month 12 = ₹1,20,000.
- Month 1: invest ₹10k. Corpus = ₹10k. On path.
- Month 2: target ₹20k. If portfolio dropped to ₹9k (NAV fell), invest ₹11k to catch up to ₹20k.
- Month 3: target ₹30k. If portfolio rallied to ₹24k, invest only ₹6k to stay on path.
20-year Nifty 50 backtest (₹10k/month base)
| Strategy | Total invested | Final corpus | XIRR |
|---|---|---|---|
| DCA (fixed ₹10k) | ₹24 lakh | ~₹1.05 cr | ~12.4% |
| Value Averaging | ₹22-26 lakh (variable) | ~₹1.18 cr | ~13.6% |
VA edges out DCA by ~1.2% CAGR over 20 years. Compounded, that's 13% more corpus on same average commitment.
Why VA outperforms (mathematically)
VA structurally enforces “buy low, sell high.” In months when market drops, you invest more. When market rallies, you invest less. Captures the mean-reversion tendency of equity markets.
DCA buys fixed units of currency. VA buys fixed units of corpus growth. The difference compounds in volatile markets — which Indian equity is.
Where VA fails
- Behavioural difficulty: Requires increasing investment during bear markets — emotionally hardest time. Most retail investors abandon VA in down markets.
- Cash flow uncertainty: Some months need 2-3x normal investment. Hard if you're salaried with fixed monthly capacity.
- Sell discipline issue: Pure VA requires selling in big rallies. Triggers tax events. Most retail skips this step → VA degrades to DCA + occasional top-ups.
- Operational: No AMC automates VA. You manually calculate + execute each month.
The simplified hybrid (recommended)
Pure VA is too operationally heavy. Hybrid that captures 80% of the benefit:
- Base SIP at fixed ₹X/month (set-and-forget).
- Maintain a ₹Y/month “opportunistic” bucket in liquid fund.
- When Nifty drops 8%+ in a month, top up equity with 2-3x base SIP from the bucket.
- When Nifty rallies 8%+ in a month, skip the top-up that month.
Captures most of VA's edge with DCA's simplicity. The ₹Y bucket auto-builds when not deployed.
Step-up SIP — the easy upgrade
Annual 10% increase in SIP amount. Captures rising salary while maintaining consistent savings rate. Backtest shows ~1.5% CAGR improvement over flat SIP over 20-year horizons.
Available via AMC SIP setup forms — fully automated. The single highest-ROI tweak to standard SIP.
Decision framework
- Salaried, predictable income, 7+ year horizon: Step-up SIP. 10% annual increment. Set + forget.
- Variable income, business owner, 5+ year horizon: Hybrid SIP + opportunistic bucket.
- Disciplined investor, willing to do monthly recalculation, 10+ year horizon: Pure VA.
- New to investing: Plain DCA. Get the habit first; optimise later.
Use the Step-up SIP calculator and SIP calculator to compare scenarios. The strategy you stick with for 20 years beats the optimal strategy you abandon after year 5.