Index investing
Understand why arithmetic of active vs passive: all investors collectively hold the market.
In this lesson
Index investing is part of Investment Strategy & Portfolio. This preview shows how investment-universe connects to everyday family decisions such as earning, saving, spending choices, goals, approvals, or parent-guided money conversations inside Progress Penguin.
Think about this money choice
Imagine this situation: An index fund tracking the NGX 30 (30 largest local companies) returned 22% in a year. The average active fund manager returned 18%. The index fund's expense ratio is 0.3% vs 1.8% for active funds.
How it works
Arithmetic of active vs passive: all investors collectively hold the market. Before fees, the average active manager earns the market return. After fees (1-2% annual), the average active manager MUST underperform the index by the fee amount. Some active managers outperform, but identifying them in advance is extremely difficult.
Apply it to a real decision
Real-life money moment: An index fund tracking the NGX 30 (30 largest local companies) returned 22% in a year. The average active fund manager returned 18%. The index fund's expense ratio is 0.3% vs 1.8% for active funds. What is the net outperformance? The key lesson is: Index investing advantage: (1) market return (passive): 22% − 0.3% = 21.7% net.
Activity preview
Apply the idea
Use the lesson to complete this short practice activity.
Try one real money action
Open Tasks and submit proof for one task, or open Requests and make a deposit request. Parent approval can happen later.
Quiz preview
Index investing means:
An index fund tracking the NGX 30 (30 largest local companies) returned 22% in a year. The average active fund manager returned 18%. The index fund's expense ratio is 0.3% vs 1.8% for active funds. What is the net outperformance?