Chapter 14

14Index Investing

Index investing accepts broad market exposure instead of trying to select winners. This chapter defines the key Indian indices and vehicles, then explains passive investing, tracking error, and low-cost investing.

Nifty 50

Example: Nifty 50 represents fifty large Indian companies across important sectors. It is not the whole economy, but it gives a transparent reference for large-cap equity behavior.

It is a broad large-cap reference for the Indian equity market. Buying a Nifty 50 index fund means accepting this basket rather than choosing individual companies.

Use as large-cap core.

• Use Nifty 50 as a simple large-cap core option.
• Understand that it is not the whole economy.
• Compare index funds by cost and tracking.

Sensex

Example: the Sensex tracks thirty large companies on BSE and is often used in Indian headlines. It is a thermometer of market mood, not a complete portfolio by itself.

It is an older, widely followed Indian market barometer. Like any index, it is a rule-based sample, not a guarantee of return.

Reference, not advice.

• Use Sensex for broad market reference.
• Do not treat index level as investment advice.
• Invest through suitable funds or ETFs if the index fits the plan.

Index fund

Example: an investor buying a Nifty 50 index fund owns the index through a mutual fund structure. The decision is to accept market return at low cost instead of searching for a superior stock picker.

Its success is measured by low cost, low tracking difference, and faithful replication. Prefer simple replication.

• Prefer simple broad-market index funds for core investing.
• Check expense ratio and tracking error.
• Hold for long horizons.

ETF

Example: an ETF trades on the exchange like a share, so the investor needs a demat and trading account. Its price can differ slightly from NAV, especially when liquidity is weak.

ETF return depends not only on NAV movement but also on market liquidity and bid-ask spread.

Trade only if you understand execution.

• Use ETFs only if you have a demat and understand trading.
• Check liquidity and tracking.
• Avoid buying at a large premium to NAV.

Passive investing

Example: a passive investor admits that consistently beating the market after costs is difficult. The discipline shifts from prediction to allocation, cost control, and staying invested.

Stay boring.

• Use passive funds when simplicity and cost control matter.
• Stay diversified and patient.
• Do not switch passive funds based on short-term index moves.

Tracking error

Example: if an index rises 12 per cent and the fund delivers 11.6 per cent before investor timing effects, the difference matters. Tracking error measures how tightly the fund follows its stated index.

It arises from cost, cash holding, replication limits, liquidity, and execution. Lower tracking error means closer index behavior.

Check tracking quality.

• Compare tracking error among similar index funds.
• Prefer consistent tracking over small marketing claims.
• Watch tracking difference over longer periods too.

Low-cost investing

Example: a small annual cost difference can compound into a large gap over twenty years. Low cost is powerful because it is known in advance, unlike outperformance.

Low cost matters because every fee is a negative return with certainty.