Archive / Investment Adviser (Level 2) / Retirement Planning Basics

nism-series-xb-100-percent-debt-portfolio-failure-rate-vs-equity[ INVESTMENT ADVISER (LEVEL 2) ]

Why does a 100% Debt / Fixed Deposit retirement portfolio suffer a HIGHER long-term failure rate over a 30-year horizon than a 50% Equity / 50% Debt diversified portfolio?

[ A ]Because bank fixed deposits are illegal for senior citizens.

[ B ]Because equity mutual funds carry zero risk.

[ C ]Because debt funds charge a 50% monthly penalty.

[ D ]Because a 100% debt portfolio lacks equity capital growth, causing post-tax interest returns to lag inflation and triggering rapid purchasing power depletion over multi-decade horizons.[ CORRECT ]

Takeaway

The correct answer is D: a 100% debt portfolio lacks any equity growth engine, so post-tax interest returns lag inflation over a 30-year horizon and purchasing power erodes faster, raising the long-term failure rate versus a 50% equity/50% debt mix.

Derivation

Fixed deposits and debt instruments deliver relatively stable but modest nominal returns, and after accounting for slab-rate taxation on interest and India's structural inflation, the real (inflation-adjusted) return on a pure-debt portfolio can be close to zero or even negative over long stretches. Over a 30-year retirement, a fixed real withdrawal rate applied to a portfolio with essentially flat real growth depletes the corpus faster than one that includes an equity allocation, whose long-run real returns (despite short-term volatility) provide the growth engine needed to keep pace with decades of inflation-linked spending. This is why glide-path/asset-allocation models retain meaningful equity exposure well into retirement rather than moving to 100% debt.

Why the others fail

A — Because bank fixed deposits are illegal for senior citizens.

Fabricated and false; bank fixed deposits are entirely legal for senior citizens -- the real driver is inflation-adjusted return, not legality.

B — Because equity mutual funds carry zero risk.

False; equity mutual funds carry real market risk -- the comparison concerns long-run real return, not a (nonexistent) zero-risk claim for equities.

C — Because debt funds charge a 50% monthly penalty.

Fabricated penalty; there is no such 50% monthly charge on debt funds -- the actual issue is inflation eroding fixed-income real returns over decades.