Long-term investing is a widely used financial strategy, and compound interest is one of the tools that can help investors work toward their financial goals. This article explains how compounding works and presents three lessons associated with Warren Buffett about growing an investment over time.
What is compound interest?
Compound interest is a basic but powerful idea in long-term investing. It means reinvesting the returns earned on an investment so they become part of the amount that can earn returns in later periods. That growing base is what allows an investment to compound over time.
Compound interest and simple interest
Simple interest is calculated only on the original principal, so the interest amount stays the same each year. Compound returns are calculated on the growing balance, so the amount earning returns can increase over time.
A hypothetical THB 10,000 example
Assume an initial investment of THB 10,000 earns 10% per year and remains invested for 30 years.
Without compounding
At 10% of THB 10,000, the annual interest would be THB 1,000. Over 30 years, the total would be THB 40,000: the original THB 10,000 plus THB 1,000 for each of 30 years.
With compounding
With the returns reinvested, the article estimates that THB 10,000 could grow to about THB 170,000 after 30 years.
The example illustrates how the time horizon and reinvestment can change the result.
Three lessons from Warren Buffett in the source article
1. Start early
Starting to invest earlier gives an investment more time to grow. The article's example says that THB 10,000 earning 10% per year for 40 years could grow to about THB 450,000.
2. Invest consistently
Regular investing is another factor the article highlights. Continuing to invest, even in smaller amounts, can help an investor make use of compounding over time.
3. Protect your principal
Protecting the original investment matters because losing principal reduces the base that can compound. The source article recommends choosing assets that fit your risk tolerance and diversifying risk.
Key takeaways
- Compound interest means reinvesting returns so they can earn returns in later periods.
- The amount of time invested affects the potential result.
- Starting early gives compounding more time to work.
- Consistent investing can support long-term growth.
- Protecting principal is important to the compounding process.
Compound interest can be a useful long-term wealth-building concept. Understanding how it works and applying the three lessons in the source article can help with investment planning.
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