Fixed Income to Asset Management: What the Interview Actually Tests

A bond with ten years of duration loses roughly 10% of its value if interest rates rise one percentage point; a bond with one year of duration loses about 1% for the same move. That arithmetic, not a stock pitch, is what a fixed income interview actually opens on.

Almost every asset management candidate walks in picturing the wrong desk — someone defending a growth story instead. That is a strange gap, because a fixed income desk is where a lot of the actual hiring happens, and it tests something close to the opposite of what a stock pitch tests.

The myth: almost everyone preps for the wrong job

The stock-pitch interview is the one every guide describes, the one every mock-interview session drills, and the one candidates picture the moment someone says "asset management." Fixed income gets a paragraph, if that. Yet some of the largest, most recognisable names in the industry are built primarily around bonds rather than stocks.

PIMCO's own site describes the firm as "a global leader in active fixed income," and puts its own assets under management at $2.33 trillion as of 30 June 2026. That is not a boutique or a side desk. It is one of the biggest managers on earth, built almost entirely on the instrument most candidates spend the least time preparing for.

$2.33tn

PIMCO AUM

30 June 2026, its own figure

Downside first

Credit research asks

Can it pay, not how much upside

Baa3/BBB-

Investment-grade floor

Bloomberg US Aggregate Index

Decades

Typical client horizon

Often a pension scheme

The gap is not that fixed income is obscure. It is that the preparation industry defaults to equities, so a candidate who walks into a bond-desk interview with an equity-shaped pitch is answering a question nobody asked.

Which desk: rates, credit, securitised, EM or multi-sector

"Fixed income" is not one job, any more than "equities" is. A candidate who says "I want to work in fixed income" without knowing which desk usually has not gotten far enough into preparing to have picked one, and it shows in the first five minutes.

Four families, and a fifth that blends them

PIMCO's own breakdown of the asset class splits issuers into four groups: government and quasi-government bonds, securitised bonds, and corporate bonds, split again into investment grade and high yield. Each maps onto a different desk with a different day job.

A rates desk lives on a view of where interest rates are heading, closer to a macro conversation than a company-by-company one. A credit desk lives inside the issuer's own numbers. Securitised is its own discipline again, closer to modelling a pool of loans than reading one balance sheet. Naming a desk, and preparing for that desk specifically, is worth more than any amount of generic fixed income vocabulary.

Where you're coming from decides what gets tested

A stock-pitch interview treats every candidate roughly the same way: defend a call, take the pushback. A fixed income interview is much more sensitive to where a candidate is arriving from, because the gap between what they already do and what the seat needs is different every time.

Five starting points, five different gaps

The technical bar starts with duration and convexity

Every one of those backgrounds eventually meets the same two ideas, and a candidate who can explain one of them cleanly outperforms one who has memorised a glossary of both.

Duration: one number for interest-rate risk

Duration rolls a bond's maturity, coupon and call features into a single number that estimates how much its price moves for a given change in interest rates. PIMCO's own explainer gives the intuition directly: a bond with one year of duration loses roughly 1% of its value if rates rise one percentage point; a bond with ten years of duration loses roughly 10% for the same move, and gains proportionally more if rates fall instead.

The question a desk asks: what does 100bp do

Here is the version that gets asked out loud. A bond has seven years of duration, and yields move 100 basis points, one full percentage point. Using the same approximation, seven years of duration times one percentage point of yield change is a price move of roughly 7%.

That single calculation, done out loud in under ten seconds, is the most common technical question on a fixed income desk. Candidates who fumble it usually fumble it from nerves, not from not knowing the method.

Convexity: the correction duration needs

Duration is a straight-line estimate, and the real relationship between bond prices and yields curves rather than runs straight. Fidelity's own education material puts it plainly: duration is "generally... a more accurate measure for small changes in interest rates," and convexity is the correction for what that straight line misses on a bigger move, more pronounced the longer a bond's duration and the lower its coupon.

For an option-free bond, that correction works in the holder's favour on both sides: the real loss on a rate rise is a little smaller than the straight-line estimate, and the real gain on a rate fall is a little larger.

So the honest answer to the 100bp question above is "roughly 7%, and a touch better than that once convexity is factored in" — a sentence that signals real fluency, since the exact size of the cushion depends on that specific bond's convexity, not on its duration number alone.

1-year duration

-1%

5-year duration

-5%

10-year duration

-10%

PIMCO and Fidelity independently give the same linear approximation. It holds well for small rate moves; convexity is the correction for larger ones.

A candidate does not need to derive either formula from scratch in an interview. Being able to say, in one clean sentence, why a longer-duration bond is more exposed to rates, and why that exposure is not perfectly linear, does more work than reciting both definitions and hoping the interviewer stops there.

A worked example, with the arithmetic

Take a seven-year-duration investment-grade bond yielding 5.2%, against a seven-year government bond yielding 4.0%. The gap, 1.2 percentage points, is the spread: the extra compensation the market demands for holding a corporate bond instead of government debt of the same maturity.

Now run two separate shocks through it, using the duration approximation above.

• Rates rise 0.5 percentage points, credit unchanged. Price impact is roughly seven years of duration times 0.5 points, or about a 3.5% fall. Nothing about the issuer changed; this is a rates story.
• The issuer is downgraded; its spread alone widens 0.5 points, rates flat. The same arithmetic applies to the spread piece: roughly another 3.5% fall.

Two completely different events, one about the whole market and one about a single issuer, produce an identical price move on paper. Telling them apart, and reacting correctly to each, is close to the actual job.

Yield is not spread, and confusing them is a tell

What each number answers

Yield is the total return a bond offers if held to maturity. Spread is narrower and more specific: PIMCO's own material defines it as the gap between the yield on a bond and the yield on a high-quality government bond, used, in its words, to help "investors gauge how much additional return they should expect for taking on extra credit risk."

FINRA's plain-language version lands on the same idea from an independent, regulatory source: a credit spread is the difference between a bond's yield and that of a comparable risk-free Treasury, and it is "a common way to judge how much of a premium you could potentially collect for taking on more risk."

The same bond, two different reasons to move

Say a corporate bond yields 5.0%, with a spread of 100 basis points over the government benchmark. The next week, nothing changes at the issuer, but government yields rise 0.2 points across the board; the corporate bond's yield rises to roughly 5.2% too, and its spread stays at 100 basis points. That move was entirely a rates story.

A month later, a competitor's product recall raises questions about the same issuer's cash flow, and its spread widens to 130 basis points even though government yields have not moved at all. Its yield is now roughly 5.3%, almost the same level as before, but for a completely different reason. A candidate who can only say "the yield went up" has not actually answered which of those two very different events just happened.

Mixing up yield and spread is one of the fastest ways to sound unprepared in this interview, because the two numbers answer different questions. Yield answers "what do I get." Spread answers "am I being paid enough for the extra risk I'm taking to get it."

What happens when a bond enters or leaves the index

Being included in a benchmark is not a footnote. It is a switch that turns a large, structural source of demand on or off, and it matters more to a bond's price, day to day, than most candidates expect.

The floor a bond has to clear

The Bloomberg US Aggregate Index, the benchmark most US investment-grade managers are measured against, requires a rating of Baa3/BBB-/BBB- or better from the middle of the major agencies, a minimum of $100 million outstanding, and at least a year left to maturity. Clear that floor and a bond is eligible; fall below it and the bond is out.

Passive demand is not a credit opinion

A large share of the money tracking that index buys a bond because the index holds it, not because an analyst formed a view on the issuer. That demand disappears the moment a bond drops out, for reasons that have nothing to do with whether anyone still likes the credit.

Why a portfolio manager cares about the mechanism

A downgrade below the index's rating floor is the clearest trigger: the bond drops out, and funds mandated to hold only investment-grade paper, alongside index-trackers, have to sell regardless of what they think the credit is worth.

A portfolio manager who understands that mechanism can tell the difference between a price falling because the market has genuinely reassessed an issuer, and a price falling because a rule forced a wave of selling that had nothing to do with credit quality. That distinction is the entire opportunity in what the industry calls a fallen angel.

The fallen angel case

A fallen angel is a bond issued investment grade and later downgraded into high yield. Ford Motor Co. is the case worth knowing, because it happened in public, on named dates, to one of the most recognisable corporate borrowers on earth.

What happened to Ford

Fitch cut Ford to BBB-, the last rung of investment grade, on 24 March 2020. The next day, S&P went further and downgraded Ford to BB+, into speculative territory, as the coronavirus outbreak cut vehicle demand. Moody's had already moved Ford into speculative-grade territory back in September 2019.

With two of the three major agencies below BBB-, Ford's bonds were reclassified as high yield under the same middle-rating convention the Bloomberg Aggregate itself uses.

Why the mechanism mattered more than the headline

Ford did not disappear as a company overnight, and plenty of analysts still thought its underlying business was investment grade in substance. What moved the price in the days around the downgrade was largely mechanical: mandates that can only hold investment-grade paper, plus index-trackers built around the Aggregate, were suddenly required to sell.

BNY Investments' own material on fallen angels describes exactly this pattern: a downgrade "gets removed from investment grade indices, forcing passive funds and many active managers to sell simultaneously," and that selling "may lead to overselling, creating potentially compelling entry points for other investors."

The actual question a credit analyst answers here

The technical question a fallen angel puts in front of a credit analyst is not "did the rating agencies get it right." It is narrower and more useful: is the price move roughly proportional to the real deterioration in the issuer's ability to pay, or is some of it simply the mechanical cost of being forced out of an index.

Getting that distinction right, case by case, is a large part of what a credit research seat is paid to do.

A bond can be a good credit and a bad investment

This is the idea that separates someone who has actually thought about credit from someone reciting definitions, and it is worth stating plainly: a company can be entirely capable of paying its debts and still be a poor bond to buy, at the wrong price. Ford's own bonds around March 2020 are the mirror image of the same idea: a price move that was, at least in part, mechanical rather than a genuine verdict on the company's ability to pay.

Why a sound credit can still be a bad purchase

A spread compensates for risk. When that spread is priced tight, the bond is offering very little extra return for the chance that something goes wrong, whether that is a downgrade, a weaker quarter, or a shift in how the market prices risk generally. If nothing goes wrong, the holder earns a modest return for having taken the risk at all. If anything does go wrong, there was almost no cushion built in to absorb it.

That is also why the fixed income pitch is a different pitch entirely from an equity one. An equity pitch argues a stock is worth more than the market thinks. A credit pitch argues the opposite kind of thing: that today's price pays enough for the risk that the issuer does not repay it.

There is no upside case to make beyond getting paid back in full, on time. The entire argument is about whether the compensation on offer justifies the risk of not being repaid.

Credit research is not equity research with bonds

This is the reframe candidates from an equity background get wrong most often, and it is worth stating as directly as possible: reading a company's numbers to decide whether to lend to it is a different exercise from reading the same numbers to decide whether to own it.

Equity research

• Asks how much upside is left in the shares
• Growth, margin expansion and multiple re-rating all matter
• A bull case with no repayment ceiling on the outcome
• Being wrong about upside costs a missed gain

Credit research

• Asks whether the company can keep paying, full stop
• Downside scenarios matter more than the upside case
• A best outcome is simply getting paid back in full
• Being wrong about downside costs real capital

An equity analyst's best-case outcome is open-ended: the stock could keep compounding for years. A credit analyst's best-case outcome is capped by definition, since a bond that performs exactly as promised still just pays its coupons and returns its principal. That asymmetry, capped upside against real downside, is why credit research spends so much more of its time asking what could go wrong than an equity analyst covering the identical company ever needs to.

What a credit research interview asks

The definitions above are necessary and not sufficient. An actual interview turns them into a question built around a real issuer or a real scenario, not a glossary recital.

The shape of the questions

• Walk through how you would size the risk in a specific corporate bond, given its rating, its spread, and where the credit cycle sits.
• A bond you follow was just downgraded. Is the sell-off justified by the fundamentals, or is some of it mechanical, the way it was for Ford in 2020?
• Explain duration and convexity to someone who has never heard either term, using an actual number.
• What is the difference between a bond that is a good credit and a bond that is a good investment, and can you give an example of each?
• Pitch a bond, not a stock: what would make you comfortable holding it, and what would change your mind.

None of these have a single memorised answer. What they are testing is whether a candidate reaches for the downside-first framing without being prompted to.

Preparing for it

1. Explain duration and convexity in plain language, with the rough size of the effect, not just the definitions.
2. Know yield versus spread cold, and be ready to say what a tight or wide spread actually implies.
3. Know which of your own experiences maps onto the gap your specific background is likely to be tested on, from the table above.

The pitch is different too

A stock pitch ends with a price target and a reason the market is wrong about it. A credit pitch ends somewhere else entirely: a statement that today's return is worth the chance the issuer does not pay it back, with a clear view on where that could break down.

What a strong fixed income pitch contains

• A read on why the spread sits where it does, and whether that is fair compensation for the risk
• The scenario where the issuer's ability to pay actually deteriorates, stated specifically rather than generically
• What would change the pitch, since a credit view that cannot be falsified is not a view

What a junior on a fixed income desk does

The day-to-day looks different from the modelling-heavy grind an equity-track candidate expects, and knowing that in advance is worth more than any technical flashcard.

A junior fixed income analyst typically covers a handful of industries rather than a single name, tracking dozens of individual bond issuances rather than building one deep model. New issuance and existing holdings both need attention: reading the documents behind a new bond to understand its terms, then keeping the model on an existing holding current as quarterly results land.

Recovery assumptions, yield to worst, and default probability sit at the centre of that model, in place of the earnings multiples an equity junior lives inside.

• Reading the legal terms behind an issuance is routine, not occasional, because those terms decide what happens if the issuer runs into trouble.
• Coverage is wide and shallow by design; depth on every name is impossible once dozens of issuances sit on one desk.
• A downgrade or a covenant question interrupts the week the way an earnings surprise interrupts an equity junior's.

The end client is patient, and that is the whole point

A lot of fixed income asset management exists to serve institutions with liabilities that stretch decades into the future, pension schemes chief among them. Liability-driven investment strategies are built to match a scheme's long-dated obligations against a portfolio's cash flows and duration.

The 2022 UK gilt-market episode is the clearest illustration of how that structure behaves under stress, and the fund structures guide covers it in full. LGIM, now run inside L&G's Asset Management division, is a concrete example of a fixed-income-led house built around exactly this kind of client.

That client base is a large part of why patience is the job rather than a personality trait bolted onto it. A pension scheme is not trying to beat the market this quarter; it is trying to be certain it can pay a retiree in thirty years. A fixed income seat built around that client rewards a completely different temperament from a desk chasing quarterly outperformance.

A different bar for every route

Fixed income is not the smaller, quieter cousin of equity investing inside asset management. It is where some of the largest firms in the industry are built, and it runs on a different set of questions: duration and convexity instead of growth and multiples, spread instead of upside, and a downside-first read on credit instead of a bull case.

Coming from a trading seat, a capital-markets desk, a ratings agency or operations changes exactly what gets tested, and none of those routes get judged against the same bar as a graduate walking in cold. Prepare for the interview that is in front of you, not the one every other guide assumes.