{"id":14234,"date":"2026-05-27T07:39:38","date_gmt":"2026-05-27T07:39:38","guid":{"rendered":"https:\/\/lemonn.co.in\/blog\/glossary\/bond-duration\/"},"modified":"2026-05-27T07:39:38","modified_gmt":"2026-05-27T07:39:38","slug":"bond-duration","status":"publish","type":"glossary","link":"https:\/\/lemonn.co.in\/blog\/glossary\/bond-duration\/","title":{"rendered":"Bond Duration"},"content":{"rendered":"

Bond duration<\/a> is a measure of a bond’s price sensitivity to changes in interest rates. It tells you how much the price of a bond will change (in percentage terms) for every 1% change in interest rates. The higher the duration, the more sensitive the bond is to rate movements. Duration is one of the most important concepts in fixed income investing.<\/p>\n

What Is Bond Duration?<\/h2>\n

Duration combines two ideas: the time to receive a bond’s cash flow<\/a>s and how much each cash flow is worth today. A bond that pays most of its value through a large maturity payment many years away has a high duration. A bond that pays large coupons every year returns more cash early and has a lower duration.<\/p>\n

Mathematically, duration reflects the weighted average time to receive all of a bond’s cash flows, where each cash flow is weighted by its present value.<\/p>\n

Two Types of Duration<\/h2>\n

**Macaulay Duration<\/a>:**
\nThe weighted average time (in years) until a bond’s cash flows are received. It is expressed in years.<\/p>\n

**Modified Duration<\/a>:**
\nMacaulay Duration adjusted by the yield<\/a>. It directly tells you the percentage price change for a 1% change in yield.<\/p>\n

Modified Duration = Macaulay Duration \/ (1 + yield\/n)<\/p>\n

Where n = number of coupon periods per year.<\/p>\n

Practical Rule of Thumb<\/h2>\n

If a bond has a modified duration of 7, a 1% increase in interest rates will decrease the bond’s price by approximately 7%.<\/p>\n

**Example:**
\nBond price: Rs 100
\nModified Duration: 7
\nRates rise by 1%
\nPrice falls to approximately Rs 93<\/p>\n

Duration and Investment Strategy<\/h2>\n

– **Rising rate environment**: prefer low-duration bonds<\/a> to minimise price loss
\n– **Falling rate environment**: prefer high-duration bonds to maximise price gains
\n– **Short-term investors**: low duration reduces mark-to-market risk
\n– **Long-term investors**: can tolerate higher duration for potentially higher returns<\/p>\n

Duration in Mutual Fund<\/a>s<\/h2>\n

Debt mutual funds publish their portfolio<\/a> duration (modified duration) in their fund factsheets. A liquid fund has a very low duration (a few days to weeks). A long-duration gilt fund may have a duration of 10 to 15 years.<\/p>\n

Practical Example<\/h2>\n

Ratan holds a 10-year G-Sec bond with a modified duration of 7.5. The RBI raises the repo rate<\/a> by 50 basis points (0.5%). The bond’s price falls by approximately 7.5% x 0.5% = 3.75%. His bond worth Rs 10 lakh falls in value to approximately Rs 9.625 lakh on a mark-to-market basis. If he holds to maturity, he still receives the full face value<\/a>.<\/p>\n

Key Takeaways<\/h2>\n

– Duration measures how sensitive a bond’s price is to interest rate changes
\n– Modified duration indicates the approximate % price change for a 1% rate change
\n– Higher duration = more price sensitivity; lower duration = less sensitivity
\n– In rising rate environments, shorter-duration bonds protect capital better
\n– Debt mutual fund factsheets publish portfolio duration; use it to assess interest rate risk<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Bond duration is a measure of a bond’s price sensitivity to changes in interest rates. It tells you how much the price of a bond will change (in percentage terms) for every 1% change in interest rates. The higher the duration, the more sensitive the bond is to rate movements. Duration is one of the […]<\/p>\n","protected":false},"author":3,"featured_media":0,"menu_order":0,"template":"","meta":{"_uag_custom_page_level_css":"","footnotes":""},"class_list":["post-14234","glossary","type-glossary","status-publish","hentry"],"blocksy_meta":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"web-stories-poster-portrait":false,"web-stories-publisher-logo":false,"web-stories-thumbnail":false},"uagb_author_info":{"display_name":"Team Lemonn","author_link":"https:\/\/lemonn.co.in\/blog\/author\/ashu\/"},"uagb_comment_info":0,"uagb_excerpt":"Bond duration is a measure of a bond’s price sensitivity to changes in interest rates. It tells you how much the price of a bond will change (in percentage terms) for every 1% change in interest rates. The higher the duration, the more sensitive the bond is to rate movements. Duration is one of the…","_links":{"self":[{"href":"https:\/\/lemonn.co.in\/blog\/wp-json\/wp\/v2\/glossary\/14234","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lemonn.co.in\/blog\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/lemonn.co.in\/blog\/wp-json\/wp\/v2\/types\/glossary"}],"author":[{"embeddable":true,"href":"https:\/\/lemonn.co.in\/blog\/wp-json\/wp\/v2\/users\/3"}],"version-history":[{"count":0,"href":"https:\/\/lemonn.co.in\/blog\/wp-json\/wp\/v2\/glossary\/14234\/revisions"}],"wp:attachment":[{"href":"https:\/\/lemonn.co.in\/blog\/wp-json\/wp\/v2\/media?parent=14234"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}