Portfolio Management interview preparation

Questions

100

Traced to a firm

40

Firms

24

Updated

September 2026

Asked at

All firmsBLBlackRock4Vanguard4WMWellington Management4Amundi3ACAQR Capital Management3Neuberger Berman3SCSchroders3Man Group2MSCI2Northern Trust2AllianceBernstein1Apollo Global Management1Blackstone1BMBNY Mellon1Carlyle Group1Fidelity Investments1Goldman Sachs1Invesco1Millennium Management1MSMorgan Stanley1NUNuveen1PIMCO1SSState Street1TPTPG1

Topic

All topicsPortfolio theory5Factor models8Asset allocation11Rebalancing3Portfolio construction7Benchmarks and tracking error5Performance measurement8Risk management6Fixed income and LDI5Currency and global3Implementation and costs5Active versus passive6India markets7Brainteasers5Career and fit16

Level

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Type

AnyTechnicalCaseMarket viewFitBrainteaser

1. 092What was your best or worst trade?Career and fitIntermediatetechnicalSSState StreetAsset Management · Boston · 2021

   Say this

   Answer the worst one, in detail, and treat it as a process question. Best trades sound like luck; a well-analysed loss with a specific lesson is the answer that gets remembered. Say the thesis, the sizing, what broke it, and what you changed.

   Then walk it

   1. State the position properly: what you bought, at what price and multiple, what the thesis was in one sentence, and how big it was as a share of the portfolio. Without the size, nobody can judge the decision.
   2. Then the falsifier. What would have told you the thesis was wrong, and did you write it down in advance? An honest 'no, and that was the mistake' is a good answer, because it identifies the actual failure.
   3. Then what broke it, and crucially whether it was your analysis or the world. Getting the mechanism right and the timing wrong, being right on the business and wrong on the valuation, or simply missing a fact are different failures with different lessons.
   4. Then the behaviour. Did you add on the way down, and on what basis? Did you re-underwrite the position from scratch, or defend the original note? Averaging down without re-testing the thesis is the classic, and admitting it is disarming.
   5. Then the change you made: writing falsifiers before entering, capping single position size, scheduling a re-underwrite after every result, or separating a trim on valuation from an exit on thesis. Specific and small beats grand.
   6. If you do give a best trade, take the luck out of it deliberately. Say which part was analysis and which was fortunate timing. Claiming full credit for a winner is the fastest way to sound unserious to anyone who has managed money.

   Where candidates lose it

   Choosing a winner and telling it as a triumph, or picking a loss so trivial that it costs nothing to admit. The question is whether you can separate process from outcome. If you cannot say what your falsifier was, the interviewer learns that you invest without one, which is worse than the loss itself.

   Expect next

   • Did you write the falsifier down beforehand?
   • Did you add to it on the way down?
   • What do you do differently now?

   Reported by candidates at State Street (Asset Management, Boston, 2021). 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.