📚 PASS Research Analyst Certification Examination Difficulty: Beginner ℹ️ Info   ~5 min read
📌 Chapter 12.3 — Risks in Investments

Imagine you are reviewing a portfolio of long-dated corporate bonds for a client during a period of shifting monetary policy. You notice that as the Reserve Bank of India (RBI) hikes the repo rate, the market price of these existing bonds has begun to decline sharply. A junior analyst might mistakenly attribute this to a change in the company’s credit quality, but as a seasoned professional, you recognize this as the mechanics of interest rate risk.

Because the bond’s coupon payment is fixed at the time of issuance, it becomes less attractive to investors when new bonds are issued at higher prevailing market yields.

Interest rate risk arises because the present value of a bond’s future cash flows—interest payments and the principal repayment—is discounted at the current market interest rate. When market rates rise, the discount rate applied to these fixed cash flows increases, causing the present value of those cash flows to decrease. Conversely, if market rates fall, the price of existing bonds rises, as their fixed coupons become more lucrative relative to new, lower-yielding instruments. This inverse relationship is the fundamental engine behind fixed-income price volatility.

To quantify this impact in your valuation models, you must consider the duration of the instrument. Duration serves as a measure of a bond’s sensitivity to interest rate changes; generally, the longer the maturity of the bond, the higher its duration and the more volatile its price in response to rate movements. A 10-year G-Sec will exhibit much greater price swings during a 50-basis-point rate hike than a 1-year Treasury bill.

As an analyst, ignoring this sensitivity can lead to significant miscalculations in your client’s portfolio drawdown potential during inflationary cycles.

When writing an investment recommendation, your assessment of interest rate risk should dictate the client’s asset allocation. If your macroeconomic outlook suggests a hawkish RBI stance, advising a client to hold long-duration bonds is effectively recommending they lock in capital losses. Instead, you would advocate for short-duration instruments or floating-rate notes, which adjust coupon payments to align with market benchmarks. By mastering the inverse mechanics of bond pricing, you move from merely reporting yields to providing strategic guidance on how to preserve capital across varying rate environments. 1

Nuance

⚠️ Nuance
Candidates often confuse ‘Interest Rate Risk’ with ‘Inflation Risk.’ While inflation affects the purchasing power of the income received, interest rate risk is specifically concerned with the market price impact of changes in benchmark yields on existing, fixed-rate securities. A common pitfall is assuming that a bond held to maturity is unaffected by interest rate risk; while it is true the principal is returned, the investor has faced ‘opportunity cost’ risk, and if they are forced to sell before maturity, the price impact is very real and immediate.

Check Your Understanding

Practice Question 1

If the Reserve Bank of India announces a surprise increase in the policy repo rate, which of the following bonds in a portfolio is likely to experience the highest percentage decline in market price, assuming all other factors remain constant?

Practice Question 2

In the context of bond valuation, why does a decrease in market interest rates lead to an appreciation in the price of existing fixed-rate bonds?

This is a companion read for Section 12.3 — Risks in Investments from PASS Research Analyst Certification Examination by Akhilesh Gururani, available on Amazon Kindle.

Copyright © 2026 Akhilesh Gururani. All rights reserved.

  1. Duration measures the weighted average time to receive the cash flows from a bond, expressed in years, providing a direct estimate of price percentage change for a unit change in yields. ↩︎