Mutual Fund Mastery interview preparation

Questions

100

Traced to a firm

32

Firms

19

Updated

September 2026

Asked at

All firmsVanguard5BLBlackRock3FTFranklin Templeton3Invesco3PIMCO3Fidelity Investments2J.P. Morgan2Morningstar2Neuberger Berman2SCSchroders2T. Rowe Price2Amundi1BMBNY Mellon1Goldman Sachs1Man Group1Northern Trust1SSState Street1Sycamore Partners1WMWellington Management1

Topic

All topicsFund structure and regulation7NAV and operations6Scheme categorisation4Equity schemes5Debt schemes7Risk, liquidity and disclosure7Index funds and ETFs6Hybrid and solution schemes3Costs, plans and commissions6SIP and investor mechanics5Performance measurement6Taxation5Distribution, compliance and NISM5Portfolio construction and advice5Estimation and numeracy5Markets and industry6Career and fit12

Level

AnyCoreIntermediateHard

Type

AnyTechnicalCaseFitBrainteaserMarket view

1. 078If margin goes down by 5 percent, how much would revenue need to increase to balance it out?Estimation and numeracyIntermediatetechnicalSycamore PartnersConsumer and Retail · New York · 2026

   Say this

   Clarify the question first, because there are two readings. If margin falls 5 percent relatively — from 20 percent to 19 — revenue must rise about 5.3 percent to hold profit flat. If it falls 5 percentage points, from 20 to 15, revenue has to rise by a third.

   Then walk it

   1. The algebra is one line. Profit equals revenue times margin. To keep the product constant, the revenue multiplier is the old margin divided by the new margin.
   2. Relative case: 20 percent falls to 19 percent. 20 divided by 19 is 1.053, so revenue rises 5.3 percent. Note it is slightly more than 5 percent, because the reciprocal is not symmetric — saying that unprompted is the part that impresses.
   3. Absolute case: 20 percentage points to 15. 20 over 15 is 1.333, so revenue rises 33 percent. Which reading applies changes the answer by a factor of six, so ask.
   4. Generalise it: a fall of x percent in margin needs revenue up by x over one minus x. A 10 percent relative margin hit needs 11.1 percent more revenue, a 20 percent hit needs 25 percent.
   5. Then say why it matters commercially, because that is what a consumer or retail interviewer is really after. Low-margin businesses are brutally exposed — for a retailer at 3 percent margin, losing one percentage point means revenue must rise 50 percent to stand still. That is the whole reason grocery retail lives or dies on cost discipline.
   6. And flag the assumption: this holds only if the incremental revenue carries the same margin. If the extra volume comes through discounting, it arrives at a lower margin and you need substantially more of it, which is the usual reason these plans fail.

   Where candidates lose it

   Answering 5 percent instantly because the numbers look symmetric. They are not — it is 5.3 percent, and interviewers use this to see whether you actually compute or just pattern-match. The bigger trap is not asking whether the 5 percent is relative or in percentage points.

   Expect next

   • Now do it for a business at 3 percent margin.
   • What if the incremental revenue comes at a lower margin?
   • Which would you rather fix, price or cost?

   Reported by candidates at Sycamore Partners (Consumer and Retail, New York, 2026). Source: Wall Street Oasis.

2. 079Roughly how big is the Indian mutual fund industry, and how many actual investors does it have?Estimation and numeracyIntermediatefirst roundIndian AMCsDistribution and sales

   Say this

   Industry assets are north of 70 lakh crore rupees, call it 800 to 900 billion dollars. There are roughly 25 crore folios but only about 5.5 crore unique investors by PAN, and monthly SIP inflows run somewhere around 28,000 to 30,000 crore. The gap between folios and unique investors is the number worth talking about.

   Then walk it

   1. Build it rather than recall it if you are unsure. Indian equity market capitalisation is around 450 lakh crore. Mutual funds own roughly 9 to 10 percent of listed equity, so domestic equity scheme AUM is in the 25 to 30 lakh crore range, and equity is a little under half the industry. That triangulates to 65 to 75 lakh crore total.
   2. Split it: roughly 55 to 60 percent equity-oriented including hybrids, the rest debt, liquid and passive, with passive now well over 10 lakh crore and growing faster than active.
   3. Investor reach is the real story. About 5.5 crore unique PANs against a population of 140 crore and roughly 8 crore income tax filers. Penetration is low even against the taxpaying population, let alone the country.
   4. Geography is concentrated too. The top five cities account for a large share of AUM, which is exactly why SEBI permits an extra expense allowance for inflows from beyond the top 30 cities.
   5. SIP flows are the structural change. Well over 25,000 crore a month of largely automated equity buying has made domestic institutions a counterweight to foreign flows — in 2022 foreign investors sold heavily and Indian equities held up, which would not have happened a decade earlier.
   6. Caveat the numbers explicitly. These move every month, AMFI publishes them, and the honest answer in an interview is a magnitude plus the direction plus where the data comes from, not a spuriously precise figure.

   Where candidates lose it

   Either refusing to give a number or quoting one to two decimal places. The skill being tested is whether you carry the industry's scale in your head and can triangulate it. Confusing folios with investors is the specific error — 25 crore folios sounds like mass adoption and 5.5 crore people does not.

   Expect next

   • What share of Indian equity do domestic mutual funds own?
   • How much of the industry is passive now?
   • Why is the folio count so much higher than the investor count?
3. 080A client invests 10,000 a month for 25 years. The fund earns 12 percent gross and charges 2 percent. How much of the final corpus goes in fees?Estimation and numeracyHardtechnicalDistribution and salesIndian AMCs

   Say this

   About a third. At 12 percent net the corpus is roughly 1.9 crore; at 10 percent net it is about 1.34 crore. So a 2 percent annual fee costs around 55 lakh, which is close to 30 percent of what the investor would otherwise have had — on total contributions of 30 lakh.

   Then walk it

   1. Set it up: 10,000 a month for 300 months is 30 lakh of contributions. At 12 percent annual, roughly 1 percent a month, the SIP future value comes to about 1.9 crore. At 10 percent it is about 1.34 crore.
   2. The difference, roughly 55 lakh, is what the 2 percent extracted. Note it is nearly twice the total money the investor put in, which is the line that makes a client sit up.
   3. Why it is so large: the fee is charged every year on the whole accumulated balance, so in the final years you are paying 2 percent on more than a crore. The fee compounds against you exactly as the returns compound for you.
   4. A rule of thumb worth carrying: over 25 years each 1 percent of annual fee costs roughly 18 to 20 percent of the final corpus. Over 35 years it is closer to 25 percent.
   5. Now make it practical. The realistic Indian choice is not 2 percent against zero, it is a regular plan at about 1.8 percent against a direct plan at about 0.8, or an index fund at 0.15. That 1 percent gap is about 20 lakh in this example, and the 1.65 percent gap against an index fund is far more.
   6. And the honest counterweight: if paying the distributor is what stops this investor from stopping the SIP in a 30 percent drawdown, the fee bought something. Compare the fee to the behavioural failure it prevents, not to zero.

   Where candidates lose it

   Not being able to do the arithmetic approximately without a calculator. You do not need precision — say 12 percent gives about 1.9 crore, 10 percent about 1.34, so the fee costs roughly 55 lakh. And do not stop at the number: the comparison a client faces is regular versus direct versus index, not 2 percent versus nothing.

   Expect next

   • Do the same for a 1 percent difference.
   • So is a distributor ever worth 1 percent a year?
   • What does the same fee cost over 35 years?
4. 081A fund falls 50 percent and then rises 50 percent. Where is the investor? And why does an average annual return overstate what people actually earn?Estimation and numeracyIntermediatetechnicalIndian AMCsDistribution and sales

   Say this

   Down 25 percent. A hundred falls to fifty, then fifty plus half of fifty is seventy-five. To get back to par from minus 50 you need plus 100, and that asymmetry is why the arithmetic average of returns always overstates the compounded result.

   Then walk it

   1. The general rule: the recovery needed is the loss divided by one minus the loss. Down 20 needs plus 25. Down 33 needs plus 50. Down 50 needs plus 100. Down 80 needs plus 400, which is why a wipeout in a concentrated position is effectively permanent.
   2. In this example the arithmetic average of minus 50 and plus 50 is zero, while the geometric average, the compound annual return, is minus 13.4 percent a year over two years. The gap between the two is driven by volatility.
   3. The approximation worth knowing: geometric return is roughly the arithmetic return minus half the variance. So two funds with the same average return and different volatility do not deliver the same wealth, and the more volatile one delivers less.
   4. That is the mathematical case for caring about drawdown rather than just average return, and it is why a small cap fund with a higher average can compound to less than a steadier fund over a full cycle.
   5. There is a second, separate gap: investor return against fund return. Money arrives after good years and leaves after bad ones, so the money-weighted XIRR investors actually earn is typically 1 to 3 percentage points below the fund's reported CAGR. Naming both gaps is the complete answer.
   6. So what I would say to a client: your return is not the average of the annual numbers on the fact sheet, and the single biggest thing you control is not selling at the bottom.

   Where candidates lose it

   Saying the investor is back to break-even. It is the classic reflex error. Then, if you only do the arithmetic and never name the geometric-versus-arithmetic point or the investor-return gap, you have answered a puzzle rather than a fund question.

   Expect next

   • What return does a fund need after a 30 percent drawdown?
   • Why is the investor's return usually lower than the fund's?
   • How does volatility reduce compounded wealth?
5. 082Estimate how long it would take a 25,000 crore small cap fund to sell a quarter of its portfolio.Estimation and numeracyHardcase studyIndian AMCsRisk and compliance

   Say this

   Somewhere between two and four weeks of trading, and that is in a normal market. Build it from position size against daily volume: a quarter of 25,000 crore is about 6,000 crore, spread across maybe 60 to 70 holdings, and a mid-sized Indian small cap stock trades perhaps 20 to 50 crore a day with the fund able to take only a fraction of that.

   Then walk it

   1. Set up the arithmetic. If the fund holds 70 stocks, the average position is around 350 crore, and selling a quarter pro rata means about 90 crore per name.
   2. Now the constraint. If a stock trades 30 crore a day and you accept taking 20 to 25 percent of daily volume before you start moving the price, you can sell about 7 crore a day. Ninety crore takes roughly 13 trading days for that name.
   3. But the distribution is what kills you. The largest and most liquid holdings can go in a day or two; the illiquid tail, often the highest-conviction small positions, can take months. The average hides the problem, so the honest answer is a range with the tail called out.
   4. Cross-check it against the published data. AMFI's mandatory monthly stress test for mid and small cap funds gives exactly this number — days to liquidate 25 percent and 50 percent of the portfolio — and large small cap funds have reported figures above 20 trading days for half the book.
   5. Then the stress adjustment. The volumes used in the calculation are normal-market volumes, and in a falling market small cap volumes contract sharply at the same moment redemptions arrive. Roughly doubling the published number is a sensible working assumption.
   6. The conclusion an interviewer wants: this is why large small cap funds hold cash and large caps as a buffer, why several have soft-closed lump sum subscriptions, and why the stress test disclosure was introduced in March 2024 in the first place. Capacity is a real constraint in this category, not a theoretical one.

   Where candidates lose it

   Producing a single confident number. The right shape is a build-up, a range, and an explicit note that the illiquid tail dominates the tail risk. Not knowing that AMFI already publishes this number monthly is the other failure — it makes the estimate look like guesswork instead of a cross-check.

   Expect next

   • Where would you find the fund's own published figure?
   • What should the manager do about it?
   • How does this change your view on the fund's capacity?

Firm tags come from public, anonymous candidate reports on Wall Street Oasis: strong signal, not sworn testimony. Firms are named as the places a question was reported, not as partners of Fin Maverick. Answers are written for this page to show how to think out loud; they are not scripts to recite.