Potential Risk Class Matrix: Reading a Debt Fund’s Rate and Credit Risk Grid

Open the factsheet of almost any Indian debt mutual fund and you’ll find a small three-by-three box near the scheme name, with one cell marked. That box is the potential risk class matrix, and most investors scroll past it. They shouldn’t. The riskometer tells you how risky a fund looks today. The PRC cell tells you the most risk the fund is allowed to take tomorrow, and that is a very different and, frankly, more useful promise.

We’ll go through what SEBI’s rules actually say, how the two scores behind the grid are calculated, and then run three made-up portfolios through the numbers so the cell stops being a mystery.

What the potential risk class matrix is

SEBI introduced the PRC matrix through a circular dated June 07, 2021, and the rules now sit in paragraph 6.18 of the SEBI Master Circular for Mutual Funds (as on March 20, 2026). Every debt scheme has to place itself in one of nine cells. The grid has two axes:

• Interest rate risk, measured by the scheme’s Macaulay Duration. Class I means a duration of up to 1 year, Class II up to 3 years, and Class III means any duration.
• Credit risk, measured by a number SEBI calls the Credit Risk Value, or CRV. Class A needs a CRV of 12 or more, Class B needs 10 or more, and Class C is anything below 10.

Put the two together and you get cells such as A-I (relatively low rate risk, relatively low credit risk) at one corner and C-III (relatively high on both) at the other. A fund in B-II, for instance, is described as having moderate interest rate risk and moderate credit risk.

Here’s the bit people miss. The cell is a ceiling, not a description. The master circular says the thresholds set the maximum interest rate risk and maximum credit risk a scheme is permitted to take, and the scheme can always sit lower on the risk scale. A fund in C-III could, in a cautious year, hold nothing but government paper. It just isn’t promising you it will.

The riskometer is a photograph of the portfolio. The PRC cell is the fence around it, and the fence is what you are really signing up for.

The nine cells at a glance

Note that the PRC cell does not replace the scheme category. A short duration fund stays a short duration fund. SEBI lets the AMC pick whichever cell it wants within that category, and the fund’s “type” description in its documents is then extended to mention the cell.

How the Credit Risk Value is scored

Each bond in the portfolio gets a CRV based on its rating. The table in the master circular runs like this:

The scheme’s CRV is simply the AUM-weighted average of these scores. One small detail that matters for the maths: SEBI says the value of each instrument used for the weights includes accrued interest, so it is the dirty price, not the clean price.

Short-term paper such as commercial paper doesn’t carry long-term ratings, so the circular takes a conservative route. The CRV is based on the lowest long-term rating of the same issuer across rating agencies. If the issuer has no long-term rating at all, the most conservative long-term equivalent from the agencies’ short-term-to-long-term mapping is used.

Look at where the Class A line falls. AAA scores exactly 12. So a fund that wants to sit in Class A can’t really afford much below AAA unless it balances it with government paper scoring 13. That’s a tight band, and it explains why so few corporate-bond-heavy funds land in Class A.

Macaulay Duration, the other axis

The RBI’s FAQ on government securities describes Macaulay Duration as the time taken to recover the initial investment in present value terms, expressed in years. It’s a weighted average of when the bond’s cash flows arrive. RBI works through a 2-year bond with a 10% coupon, priced at ₹101.79 when the 2-year yield is 9%, and gets a duration of 1.86 years. The same FAQ then computes modified duration for that bond at 1.78, which is the number that tells you roughly how much the price moves for a 1% change in yield.

A word of caution on labels. SEBI’s circular uses “MD” for Macaulay Duration. Fund factsheets often show both Macaulay and modified duration side by side, and some abbreviate modified duration as MD too. For the PRC cell, it’s Macaulay Duration that counts.

Scheme-level duration works the same way as CRV: an AUM-weighted average of each instrument’s Macaulay Duration.

There’s also a cap on individual bonds

The duration limit alone could be gamed with a barbell of very short and very long paper. SEBI closes that door. For a scheme in Class I, every instrument it holds must have a residual maturity of no more than three years. For Class II, the cap is seven years. Class III can hold anything. Central and state government securities are exempt from the Class I and Class II residual maturity caps.

Worked example 1: a fund that looks like Class A but isn’t

These portfolios are hypothetical, built only to show the arithmetic. Say Fund X holds:

• 40% in G-Secs (CRV 13), with a Macaulay Duration of 3.5 years
• 35% in AAA corporate bonds (CRV 12), duration 2.0 years
• 25% in AA bonds (CRV 10), duration 1.5 years

Weighted CRV = (0.40 × 13) + (0.35 × 12) + (0.25 × 10) = 5.2 + 4.2 + 2.5 = 11.9.

That’s below 12, so Fund X fails Class A by a whisker and lands in Class B. Three-quarters of the book is G-Sec or AAA, and it still doesn’t qualify. The AA slice drags it down.

Weighted Macaulay Duration = (0.40 × 3.5) + (0.35 × 2.0) + (0.25 × 1.5) = 1.4 + 0.7 + 0.375 = 2.475 years.

That’s within 3 years, so Class II. Fund X fits B-II, which, as it happens, is the same cell SEBI uses in its own example of a short duration fund with duration up to 3 years and CRV of 10 or more. One more check: as a Class II scheme, none of its corporate bonds can have more than seven years of residual maturity. The G-Secs are exempt.

Worked example 2: a near-cash fund

Fund Y keeps half its money in TREPS and cash (CRV 13) and half in commercial paper from issuers whose lowest long-term rating is AAA, so that paper scores 12 under the conservative rule. Suppose the TREPS and cash portion has a duration of 0.05 years and the commercial paper 0.3 years.

CRV = (0.5 × 13) + (0.5 × 12) = 6.5 + 6.0 = 12.5, comfortably Class A.

Duration = (0.5 × 0.05) + (0.5 × 0.3) = 0.025 + 0.15 = 0.175 years, Class I.

Fund Y sits in A-I, the safest corner of the grid. Notice that if one of those CP issuers had a long-term rating of AA from one agency and AAA from another, the CRV would use the AA, and the fund’s score would drop. That’s the conservative rule doing its job.

Worked example 3: when a downgrade pushes a fund out of its cell

Fund Z has chosen A-II. It holds 60% AAA (CRV 12), 30% G-Secs (CRV 13) and 10% in a single AA bond (CRV 10).

CRV = 7.2 + 3.9 + 1.0 = 12.1. Inside Class A, but barely.

Now the AA bond is downgraded to AA-, which scores 9. The CRV becomes 7.2 + 3.9 + 0.9 = 12.0. Still in, right on the line.

A second downgrade takes the bond to A, scoring 7. CRV = 7.2 + 3.9 + 0.7 = 11.8. The fund is now carrying more credit risk than its cell allows.

This is where the PRC framework has teeth. Under the master circular, once a scheme has picked its cell, any change in positioning that results in risk higher than the maximum for that cell is treated as a change in fundamental attributes under Regulation 22(9)(c). That route comes with its own investor protections, so a fund can’t just drift quietly into a riskier cell. AMCs also have to tell unitholders about their cell and any later change by SMS and through a link on their website.

A single 10% holding, downgraded twice, was enough to push a mostly-AAA portfolio out of Class A. That’s how thin the margins are at the top of the grid.

We find this example useful because it shows how little room a Class A fund really has. If you hold such a fund for safety, a quick look at its lowest-rated holdings tells you how close to the edge it’s running.

Where the cell matters in a crisis: swing pricing

The PRC cell isn’t just a disclosure. It also decides which funds face mandatory swing pricing when SEBI declares a market dislocation. In that case, swing pricing becomes compulsory for open-ended debt schemes (other than overnight funds, gilt funds and 10-year constant maturity gilt funds) that have High or Very High risk on the riskometer and sit in cells A-III, B-II, B-III, C-I, C-II or C-III.

The minimum swing factors SEBI sets for those situations are:

In plain terms, swing pricing kicks in only when a scheme faces net outflows. The NAV is adjusted by at least that factor for investors coming in and going out, and a scheme can levy a higher factor within a cap the AMC decides. Redemptions of up to ₹2 lakh per scheme, counted at PAN level, are exempt. So if you hold a large amount in a C-III fund with a High riskometer and money rushes out during a declared dislocation, your exit NAV would be adjusted by at least 2%. That’s a real cost, and the grid hints at it if you know how to read it.

How to use the PRC cell when picking a debt fund

• Match the cell to the job. Money you need in a few months belongs in an A-I or similar fund. Don’t buy a C-III fund for an emergency corpus because last year’s return looked nice.
• Read it next to the riskometer. Our guide to the mutual fund riskometer explains what the six levels mean. The riskometer moves with the portfolio; the PRC cell only moves through a formal process.
• Check the gap between cell and portfolio. A fund in Class C that currently runs a CRV of 12 has room to take far more credit risk without asking you. Funds in the credit risk fund category will usually sit in Class C for exactly that reason.
• Look at the lowest-rated paper. As Fund Z showed, a small holding near the bottom can decide the cell.
• Don’t confuse the two “MD”s. Use Macaulay Duration for the cell, modified duration for price sensitivity.

Debt funds feel boring until a credit event hits, and then they become the most stressful thing in a portfolio. The PRC cell is one of the few places where the AMC tells you, up front, the worst it is allowed to do. Treat it as part of your wider risk management, not as decoration on the factsheet.

Disclaimer: This article is for educational purposes only and is not investment advice. The fund examples are hypothetical and do not refer to any real scheme. Mutual fund investments are subject to market risks; read all scheme-related documents carefully and consult a SEBI-registered investment adviser before investing.