Investment Banking interview preparation

Questions

100

Traced to a firm

100

Firms

46

Updated

September 2026

Asked at

All firmsTSTruist Securities10Rothschild & Co8Centerview Partners7CSCredit Suisse7HWHarris Williams6Houlihan Lokey6Lazard6Mizuho6Barclays5Citi5Deutsche Bank5Evercore5Moelis & Company5MSMorgan Stanley5Piper Sandler5RCRBC Capital Markets5Goldman Sachs4Nomura4TD Securities4Bank of America3GSGuggenheim Securities3J.P. Morgan3Jefferies3Moody's3Perella Weinberg Partners3WPWarburg Pincus3WBWilliam Blair3HSBC2Lincoln International2Scotiabank2TPTPG2UBS2Wells Fargo Securities2Advent International1Apollo Global Management1Bain Capital1Balyasny Asset Management1BLBlackRock1BPBNP Paribas1General Atlantic1Invesco1Morningstar1PIMCO1STSociété Générale1SSState Street1WMWellington Management1

Topic

All topicsAccounting14Valuation21M&A10Markets and deals10Capital markets3LBO8Leveraged finance3Restructuring2Credit3Debt capital markets2Capital structure2Case and estimation11Brainteasers6Fit5

Level

AnyCoreIntermediateHard

Type

AnyTechnicalCaseBrainteaserFitMarket view

1. 069Explain the different ways a firm might finance itself, besides straight equity and debt.Capital structureIntermediatetechnicalHSBCGeneralist · New York · 2024TSTruist SecuritiesCorporate Banking · Atlanta · 2025

   Say this

   Everything in between: convertible bonds, preferred stock, mezzanine and PIK, plus asset-based routes like securitisation, sale-leaseback, factoring and equipment leasing. And structural options like a rights issue or a convertible preferred.

   Then walk it

   1. Hybrid instruments sit between the two: convertible bonds give a low coupon in exchange for equity upside, preferred stock ranks ahead of common with a fixed dividend, and mezzanine or PIK sits below senior debt with equity warrants attached.
   2. Asset-based financing monetises specific assets rather than the whole enterprise: asset-backed lending against receivables and inventory, securitisation of a receivables pool, factoring, and equipment leasing.
   3. Sale-leaseback converts owned real estate into cash while keeping the operational use. It is off-balance-sheet in spirit, though under current standards the lease liability comes back on.
   4. Operational financing is often overlooked: stretching supplier terms, customer prepayments and deferred revenue are all working capital funding, and they cost nothing.
   5. And there are equity variants: rights issues to existing holders, PIPEs, convertible preferred for a strategic investor, and in some markets government or development-bank funding for specific projects.
   6. The structuring logic is to match the funding to the asset. Long-lived assets get long-dated debt, receivables get revolving asset-based facilities, and uncertain growth gets equity or something convertible.

   Where candidates lose it

   Listing instruments with no organising principle. Group them, hybrids, asset-based, operational, equity variants, and finish with the matching principle. A list without a frame reads like flashcards.

   Expect next

   • When would you advise a convertible over straight equity?
   • What are the primary categories of collateral securing an asset-based loan?
   • What is the difference between a loan and a bond?

   Reported by candidates at HSBC (Generalist, New York, 2024); Truist Securities (Corporate Banking, Atlanta, 2025). Source: Wall Street Oasis.

2. 094How many aeroplanes are in the air at once?BrainteasersIntermediatetechnicalSTSociété GénéraleMergers and Acquisitions · New York · 2025HSBCSales and Trading · Hong Kong · 2026

   Say this

   Around ten to fifteen thousand. Build it from the fleet: roughly 25,000 commercial aircraft worldwide, each flying maybe 10 hours a day, so about 40 percent are airborne at any moment, which gives 10,000.

   Then walk it

   1. Start from a number you can defend: the global commercial fleet is on the order of 25,000 aircraft. If you do not know it, build it from airlines: a few hundred carriers averaging perhaps 80 aircraft.
   2. Utilisation: a commercial jet flies roughly 8 to 12 hours a day. Call it 10, which is about 40 percent of a 24-hour day.
   3. 25,000 times 0.4 gives 10,000 airborne on average.
   4. Then adjust for the peak-trough pattern. Air traffic is concentrated in daylight hours across the Northern Hemisphere, so the daytime peak might be 50 percent above average and the small hours well below. Peak perhaps 15,000.
   5. Then say what you excluded and why: private aviation, cargo and military would add to it, probably a few thousand more, and I have not counted them.
   6. Close with the sanity check: published flight-tracking figures sit in the same range, low to mid five figures, so the estimate holds.

   Where candidates lose it

   Guessing a number with no derivation, or getting lost in decimals. Market sizing is judged entirely on structure. State each assumption, keep the arithmetic round, and say which populations you left out.

   Expect next

   • How many taxis are in Hong Kong Central?
   • How many hotel beds are there in New York City?
   • How many books were sold in the US last year?

   Reported by candidates at Société Générale (Mergers and Acquisitions, New York, 2025); HSBC (Sales and Trading, Hong Kong, 2026). Source: Wall Street Oasis.

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.