§01 · EDITORIAL · GLOSSARY · ULTRA-SHORT-DURATION-FUND

Ultra-Short Duration Fund

A SEBI-categorised debt fund that maintains a Macaulay duration of 3 to 6 months in its portfolio, bridging the gap between liquid funds and short-duration funds.

Glossaryglossary

An ultra-short duration fund is a SEBI-categorised open-ended debt scheme that maintains a Macaulay duration of 3 to 6 months across its portfolio (SEBI Circular SEBI/HO/IMD/DF3/CIR/P/2017/114, October 2017). Macaulay duration — the weighted-average time to receive a bond's cash flows, weighted by present value — is the primary parameter SEBI uses to classify most debt sub-categories. The 3–6-month band sits above liquid funds (residual maturity ≤91 days, effectively ≤3 months duration) and below low-duration funds (6–12 months).

Ultra-short duration funds are widely used by retail and corporate investors to earn a modest yield pickup over liquid funds while maintaining relatively low interest-rate sensitivity, typically for deployment horizons of 1–6 months.

What sits in the portfolio

To maintain a 3–6 month Macaulay duration, fund managers typically blend:

Short-dated CDs (3–9 months): High-quality bank certificates of deposit; typically carry AAA or equivalent credit quality.
Commercial paper (CP): Corporate and NBFC paper of 90–270 days; credit quality varies — higher-yielding CP from NBFCs or mid-tier corporates can push duration-band funds into credit territory.
Short-dated NCDs: Non-convertible debentures of corporates with 3–9 month residual maturity; rated AA to AAA in conservative funds.
Treasury bills (182-day, 364-day): Government-backed, contributing to credit quality.
Repo / TREPS: Shorter-end positions used for liquidity management.

The credit quality distribution varies significantly across funds — some ultra-short funds are conservatively positioned (90%+ in AAA/Sovereign), while others take deliberate credit exposure to boost YTM. Investors should always examine the credit quality breakdown and top-10 issuer concentration in the monthly factsheet.

Risk profile

Ultra-short duration funds carry a moderate combination of duration and credit risk:

Duration risk is low but not negligible: A Macaulay duration of 5 months corresponds to a modified duration of approximately 0.45 years. A 100 bps yield spike would reduce NAV by approximately 0.45% — contained but observable.
Credit risk depends entirely on the fund's credit positioning. Conservative ultra-short funds (all AAA/G-Sec) carry near-zero credit risk; credit-aggressive funds in this duration band carried significant losses during 2018–2020 credit events.
Rollover risk: Unlike liquid funds, ultra-short funds hold instruments maturing in 3–6 months, which must be reinvested at prevailing rates. In a rate-cutting environment, rolling yield may decline, but the locked-in yield on existing instruments provides a partial buffer for the remaining holding period.

Taxation (post-Finance Act 2023)

Finance Act 2023 Section 50AA applies; all gains taxed as STCG at income slab rate. For investors deploying for 3–6 months, the impact is proportionate — the gain is modest relative to the full-year yield. However, for investors who previously held ultra-short duration funds for 3+ years to harvest indexation benefits, the Finance Act 2023 change materially increased their effective tax rate. IDCW option distributions attract TDS of 10% above ₹5,000 per annum.

Worked example

ICICI Prudential Ultra Short Term Fund (AMFI scheme code: 120505 — illustrative; verify from amfiindia.com) reported a portfolio YTM of approximately 7.20%, Macaulay duration of 4.8 months, and modified duration of approximately 0.46 years as at 31 March 2025. An investor deploying ₹5 lakh for 4 months would earn approximately ₹11,967 (₹5 lakh × 7.20% × 4/12) before tax. At a 30% slab rate, post-tax is approximately ₹8,377 — an annualised post-tax yield of approximately 5.04%. This represents a yield pickup of approximately 20–30 bps over a comparable liquid fund, reflecting the marginal duration and credit premium.

Primary source

SEBI Circular SEBI/HO/IMD/DF3/CIR/P/2017/114 (6 October 2017): sebi.gov.in. Finance Act 2023, Section 50AA. AMFI scheme and factsheet data: amfiindia.com.

Past performance is not indicative of future returns. Mutual fund investments are subject to market risks. Read all scheme-related documents carefully. ARN-314872. APMI APRN-01658. Content is informational and not investment advice.

Reviewed · January 2026