Portfolio Diversification
Diversification is the practice of spreading your investments across different assets, sectors, and geographies to reduce risk. The classic principle: "Don't put all your eggs in one basket." In investing terms, when one asset falls, another may hold steady or rise.
Asset Allocation is the most important investment decision you will make. It refers to how much of your portfolio is in equity (stocks/equity mutual funds), debt (bonds/debt funds), and other assets like gold or real estate. Research consistently shows that asset allocation determines over 90% of long-term portfolio returns.
The 100-minus-age rule is a simple starting guideline: subtract your age from 100 to get your equity percentage. A 25-year-old should have 75% in equity; a 50-year-old, 50%. Younger investors can tolerate more risk because they have more time to recover from market falls.
Correlation measures how two assets move relative to each other. Perfectly correlated assets move together (not helpful for diversification). Negatively correlated assets move in opposite directions — the ideal combination. Gold typically has low or negative correlation with equities, making it a classic diversifier.
Sector diversification within equities is equally important. A portfolio of only IT stocks would have crashed severely in 2022 when the sector fell 40%. Spreading across IT, banking, FMCG, pharma, and energy cushions sector-specific downturns.
Rebalancing is the process of bringing your portfolio back to your target allocation after market movements shift the percentages. If your target is 70% equity and a bull market pushes it to 85%, you sell some equity and buy debt — this is disciplined "sell high, buy low." Review and rebalance annually or when allocations deviate by more than 5%.
Practical Exercises
- 1
Calculate your current asset allocation across all investments (FD, mutual funds, stocks, gold)
- 2
Apply the 100-minus-age rule to determine your ideal equity allocation
- 3
Check the correlation between Nifty 50 and gold prices over the last 5 years
Key Takeaways
Asset allocation — how you split between equity, debt, and gold — determines long-term returns
The 100-minus-age rule is a simple starting point for equity allocation
Low-correlation assets (gold + equity) reduce portfolio volatility
Rebalance annually to maintain your target allocation
Chapter Quiz
1. According to the 100-minus-age rule, a 30-year-old should have what equity allocation?
2. Research shows that what percentage of long-term returns is determined by asset allocation?
3. Gold is used as a diversifier because it has __ correlation with equities
4. Rebalancing means:
* This content is for educational purposes only and does not constitute financial advice. Investments in securities markets are subject to market risks. Consult a SEBI-registered financial advisor for personalized guidance.