Day 21 — Interest Rates: The Cost of Money

 

Introduction

Money is not free.

When you borrow money, you pay a price — this price is called the interest rate.

Interest rates are one of the most powerful forces influencing financial markets.

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W/H (What / Why / How)

What are Interest Rates?
Interest rates are the cost of borrowing money.

Why do they matter?
Because they affect:

• loans and borrowing
• business investment
• asset prices

How do they work?

• higher rates → borrowing expensive → spending reduces
• lower rates → borrowing cheap → spending increases

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Insights from Financial Thinkers

Irving Fisher studied how interest rates connect inflation, money, and economic activity.

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Simple Understanding

Think of interest rates like rent for money.

If rent is high:

• fewer people borrow

If rent is low:

• more people borrow

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Deeper Insight

Interest rates influence not just borrowing,
but also how investors value assets.

Higher rates often:

• reduce asset prices

Lower rates often:

• support higher valuations

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Real Market Behaviour

• rate hikes → markets may slow
• rate cuts → markets may rise

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Practical Insight

Tracking interest rates helps:

• understand market direction
• anticipate economic changes

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Concept Anchor

Interest rates are the cost of money.

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Quick Recap

• Higher rates → slower growth
• Lower rates → faster growth
• Strong impact on markets

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Closing Thought

Interest rates quietly shape the entire financial system.

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