🧷 Authentic Classroom Explanation by IAS Monk

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📌 Question

In the context of finance, the term ‘beta’ refers to

(a) the process of simultaneous buying and selling of an asset from different platforms.
(b) an investment strategy of a portfolio manager to balance risk versus reward.
(c) a type of systemic risk that arises where perfect hedging is not possible.
(d) a numeric value that measures the fluctuations of a stock to changes in the overall stock market.

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✅ Correct Answer: (d)

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🧠 Explanation

Beta (β) is a statistical measure of a security’s systematic risk relative to the overall market.

• β = 1 → Stock moves in line with the market
• β > 1 → Stock is more volatile than the market (high-risk, high-reward)
• β < 1 → Stock is less volatile than the market (more stable)
• β = 0 → No correlation with the market
• Negative β → Moves opposite to the market

Beta captures market-related risk, not company-specific (unsystematic) risk.
It is widely used in CAPM (Capital Asset Pricing Model) to estimate expected returns.

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🔍 Curiosity Raiser

If beta measures market risk,
👉 why do diversified portfolios still face losses during market crashes?

(Hint: systematic risk cannot be diversified away.)

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🧘 IAS Monk Whisper

Risk is not what you feel.
Risk is what the market measures.