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Why borrowing to invest multiplies both gains and drawdowns symmetrically

July 6, 2026 · 13 min

Juniper Vale & Mark Delaney

With 2:1 leverage, a 10% asset loss wipes out 20% of your equity — and recovering that 20% equity loss requires a 100% asset gain, not 20%. The math is symmetric on the way down but asymmetric in recovery. Research on manufacturing firms finds 20–40% debt-to-equity ratios genuinely maximize returns, but the optimal threshold shifts invisibly with market conditions.

Financial leverage is the practice of using borrowed capital to control a larger asset base than equity alone would permit, with the goal of earning a return on those assets that exceeds the cost of the debt.

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About this episode

Leverage has a reputation as something hedge funds do — a specialist risk, not your problem. This episode complicates that. Pension funds and target-date funds use leverage too, and the arithmetic governing all of it is the same: borrow at one rate, invest at a higher one, and the spread between them is your engine. The equity multiplier — assets divided by equity — doubles your gains at 2:1, and doubles your losses just as cleanly. The asymmetry comes in the recovery: a 50% drop in assets at 2:1 leverage wipes equity entirely, and even a more modest leveraged loss requires a disproportionate gain just to return to zero. The episode traces why this keeps breaking things that should know better. There's the margin call cascade that nearly froze global equity markets in March 2020, documented in the Journal of Financial Markets. There's the Archegos collapse in 2021, where synthetic leverage through total-return swaps was invisible to each individual prime broker — and to regulators working from balance sheets that never showed the full exposure. And there's the endogeneity problem that makes all of it harder to govern: leverage responds to rising asset prices and also causes them, which means the signal regulators most need during a boom is partly a product of the thing they're trying to measure. The episode doesn't land on a clean answer. It earns the ambiguity.

Frequently asked

How does leverage amplify investment losses?

At 2:1 leverage, an investor holds an asset using 50% borrowed money, so a 10% drop in the asset's value translates to a 20% loss on the investor's own equity. This is because losses on the full asset base fall entirely on the smaller equity slice, making the percentage crater always larger than the asset's percentage decline.

Why is recovering from a leveraged loss harder than the loss itself?

After a leveraged loss, gains must be calculated from a smaller equity base. At 2:1 leverage, a 50% asset decline can wipe equity to zero; even a partial loss requires disproportionate recovery gains. A 20% equity loss from leverage requires a 100% subsequent gain just to break even — not 20%.

What is the optimal debt-to-equity ratio for investing?

Research on manufacturing firms and Indian listed companies finds that a debt-to-equity ratio of roughly 20–40% genuinely maximizes returns, partly because interest on debt is tax-deductible, reducing effective borrowing costs. Beyond that range, leverage amplifies losses faster than it improves returns. Critically, this optimal threshold shifts with market conditions and is only visible in hindsight.

How did Archegos Capital use hidden leverage in 2021?

Archegos Capital built concentrated stock positions through total-return swaps — synthetic leverage that never appeared as debt on a balance sheet. Archegos split positions across multiple prime brokers, so no single broker saw the full exposure. When prices moved against those positions, every broker unwound simultaneously, causing billions in losses across institutions that each believed their own risk was contained.

How did leverage cause the March 2020 equity market crisis?

In March 2020, falling equity prices triggered margin calls on leveraged investors, who were forced to sell immediately into an already-declining market. Those forced sales pushed prices further down, triggering margin calls on the next wave of leveraged investors. The Journal of Financial Markets documented this self-reinforcing cascade, which nearly broke global equity market liquidity.

Grounded in 12 sources
Pengaruh Leverage terhadap Financial Performance Properti & Real estate di Indonesia (2020–2024): Peran Moderasi Financial distress · doi.org
Financial Performance Analysis: A Case Study of PT Adhi Karya (Persero) Tbk and Listed Construction Companies in Indonesia with Dupont Analysis · doi.org
Regulating the Financial Cycle: An Integrated Approach with a Leverage Ratio · doi.org
The Double-Edged Sword of Debt: How Financial Leverage Shapes the Fate of Manufacturing Companies · doi.org
The Dynamics of Debt-Equity Mix and Financial Outcomes: A Comprehensive Study of Indian listed firms · doi.org
Contagious margin calls: How COVID-19 threatened global stock market liquidity - PMC · pmc.ncbi.nlm.nih.gov
Leverage and derivatives – the case of Archegos · esma.europa.eu
The Great Game Will Never End: Why the Global Financial Crisis Is Bound to Be Repeated · mdpi.com
Leveraged Returns Calculator · a2zcalculators.com
The Archegos Implosion: A Case Study in Synthetic Leverage and Prime Brokerage Fragmentation | Finexus · api.finexus.net
Leverage, Forced Asset Sales, and Market Stability: Lessons from Past Market Crises and the Flash Crash · assets.publishing.service.gov.uk
Stress testing the UK banking system: Guidance on the 2025 stress test for participants | Bank of England · bankofengland.co.uk
Read transcript

Juniper Vale: Hey — quick question before we start, and I mean this genuinely: do you know if any of your retirement accounts use leverage?

Mark Delaney: I — uh, honestly? No. I have no idea. Should I be worried right now?

Juniper Vale: That is the whole episode, actually. Because the assumption most people carry is that leverage is something hedge funds do — a day-trader move, risky by design, something you'd know if you were doing it. And it turns out pension funds and target-date funds use it too. Ordinary savers are already touching it.

Mark Delaney: Okay, that's — I genuinely did not know that. Like not in a vague 'probably true' way, I just didn't know.

Juniper Vale: And here's the reason it matters. With 2:1 leverage — which is not exotic, that's a pretty standard ratio — a 10% loss on an asset doesn't cost you 10%. It costs your equity 20%. Because you're only holding half the asset with your own money.

Mark Delaney: Right — because the debt-to-equity ratio is amplifying everything. Gains and losses both.

Juniper Vale: Both, yes. But the recovery math is where it gets genuinely strange. To climb back from that 20% equity loss, you don't need a 20% gain. You need 100%. I mean — just sit with that for a second.

Mark Delaney: A hundred. Not — wait, not to make money, just to get back to zero.

Juniper Vale: Just to break even. The multiplier is symmetric in how it hits you. The hole it digs is not symmetric in how you climb out.

Mark Delaney: So the math is totally visible — it's not hiding anywhere — and yet things blow up on leverage constantly. Big things. Billion-dollar things.

Juniper Vale: That's the question I can't quite answer cleanly. If the arithmetic is this clear, why does leverage keep breaking institutions that should absolutely know better?

Mark Delaney: Okay, but I think — uh, the reason it keeps breaking things is actually baked into the setup from the start. Like, imagine you borrow money at 3% and you put it into something returning 8%. That 5% gap, the spread — that's your engine. The whole machine runs on that.

Juniper Vale: And the more you borrow relative to what you actually own, the harder that engine runs.

Mark Delaney: Right — both directions. Which is the part I keep tripping on. Because the spread sounds so clean. Borrow cheap, invest dear, pocket the difference. It sounds like a vending machine.

Juniper Vale: There's actually a name for what you're describing — the equity multiplier. Assets divided by equity. If you have a dollar of equity and two dollars of assets, your multiplier is two. Every percentage point the assets earn, your equity earns double.

Mark Delaney: Wait — and that's the same ratio that makes the losses double.

Juniper Vale: Exactly the same number, yes. And this is why DuPont analysis — the framework that decomposes return on equity — treats the equity multiplier as its own separate factor. You can have a company with mediocre profit margins and slow asset turnover, but if the multiplier is high enough, their reported ROE looks great. The leverage is doing the flattering.

Mark Delaney: So a company can look healthy on paper and the number is technically real, it's just... mostly borrowed.

Juniper Vale: Which brings up the interesting part — moderate leverage actually does improve performance. Research on manufacturing firms, Indian listed companies — debt-to-equity around 20 to 40 percent genuinely maximizes returns. The tax shield on debt interest is real. Interest is deductible, so your effective borrowing cost drops below the stated rate.

Mark Delaney: Huh. So there's a sweet spot. But — wait, what happens past it?

Juniper Vale: PT Adhi Karya. Indonesian construction firm — high leverage, weak underlying asset returns. The debt-to-equity ratio is there, but the assets aren't producing enough to cover it. Altman Z-Score flags it as distressed. The equity multiplier is running hard with nothing feeding the spread.

Mark Delaney: So the engine's revving but there's no fuel. The spread collapses and the multiplier just... amplifies the hole.

Mark Delaney: I mean — that's the weird thing, right? Moderate leverage is genuinely, measurably good. The research says so. And yet when someone says 'this company is highly leveraged,' it sounds like an insult. How did a tool that works get such a bad name?

Juniper Vale: It gets a bad name because the symmetry is a lie. Not in the math — the math is honest. But in how it plays out in time.

Mark Delaney: Wait — how is it a lie if the math is honest?

Juniper Vale: Okay, think of it like this. You're at 2:1 leverage. Asset drops 50%. Your equity doesn't drop 50% — it goes to zero. But say you survive that somehow, you hold on. To get back to par, the asset now needs to gain 100% from where it is. The multiplier hit you on the way down and it cannot un-hit you on the way up — the hole is structurally deeper than the fall.

Mark Delaney: Oh. Because you're climbing from a smaller base.

Juniper Vale: From a smaller base, yes. And the return on equity amplification works the same way in reverse — any loss on the full asset base lands entirely on your equity slice. So the percentage crater is always bigger than the percentage drop in assets.

Mark Delaney: So the 20 to 40 percent debt-to-equity range — the research that says moderate leverage actually works — that's from firms that, uh... survived. Right? Like, is that just counting the winners?

Juniper Vale: That's the part I want to sit with, because yes — it's backward-looking research. The firms that blew up before they could be studied aren't in the sample. And the 20 to 40 percent optimal range, that threshold, it shifts with market conditions. It's not a fixed line you can stand on. You only know where it was after you've crossed it.

Mark Delaney: That's — that's actually kind of terrifying. The sweet spot is invisible while you're in it.

Juniper Vale: And it gets concrete fast. Picture a pension fund manager — bond holdings down 15% in three days, and the fund is marked-to-market daily. Not monthly, not quarterly — every morning. They breach their equity cushion. The lender doesn't send a letter. The call comes that morning. Sell $200 million into a market that is already falling.

Mark Delaney: And that's not — wait, that's not someone who made a reckless bet. That's just the math of daily marking catching up to them.

Juniper Vale: That's the margin call. And when every leveraged fund in the system gets that same call in the same week, it compounds into something that nearly broke equity market liquidity in March 2020. That's what we'll get into next.

Mark Delaney: Yeah — and I'd guess most people have no idea that happened. Like, at all.

Juniper Vale: Most people don't. The Journal of Financial Markets documented it — March 2020, equity prices fall, leveraged investors get margin calls, they sell, prices fall further, more margin calls. The whole thing was self-reinforcing. Nearly broke global equity liquidity.

Mark Delaney: Wait — nearly broke it? Like, globally?

Juniper Vale: Globally. And what makes the cascade the thing — not just one fund in trouble — is that a margin call demands you sell now. Collateral drops below the required threshold, you post more or you liquidate. You don't get to wait for a better price.

Mark Delaney: Right — and the selling is happening into the same falling market that triggered the call in the first place.

Juniper Vale: Which depresses prices further. Which hits the next leveraged investor's collateral. Who now also gets a call.

Mark Delaney: So it's not — uh, it's not contagion like a rumor spreading. It's mechanical. The math forces the next sell.

Juniper Vale: Exactly. And 2008 was the same mechanism at larger scale — leverage embedded in mortgage-backed securities propagated losses across institutions that had zero direct exposure to the original mortgages. The cascade traveled through the leverage, not through the asset.

Mark Delaney: Okay — but what actually gets me is this. That's all visible leverage, right? Somebody somewhere could theoretically see the debt on a balance sheet. What about when the leverage isn't on the balance sheet at all?

Juniper Vale: That's the harder problem. Total-return swaps — you get full economic exposure to an asset without ever owning it. No debt line on your balance sheet. You look unlevered. You're not.

Mark Delaney: Archegos.

Juniper Vale: Archegos. 2021. Concentrated positions in a small number of stocks, all held through total-return swaps — synthetic leverage. And they didn't do it with one prime broker. They split the positions across multiple prime brokers. Each one saw only its own slice.

Mark Delaney: So each broker thinks they have a manageable piece of a position, and... none of them know the actual total size. Nobody has the whole picture.

Juniper Vale: Nobody. And when the positions moved against Archegos, every prime broker unwound simultaneously. Billions in losses — across institutions that had each individually believed their own risk was contained.

Mark Delaney: That's — I mean, that's not a personal finance mistake. That's not someone being reckless with their own money. That's a system that was designed in a way that made the aggregate invisible until it detonated.

Juniper Vale: Which is why the question matters — if no single observer can see the total synthetic leverage in a system, can regulation actually fix it? The Bank of England is doing leverage-ratio requirements, but those apply to balance sheets. If the exposure never appears on one—

Mark Delaney: Yeah, so — the Bank of England's framework, the countercyclical part, tighten during the boom, loosen during the stress — that actually sounds pretty smart in theory. But it's aimed at balance sheets. And Archegos never showed up on anyone's balance sheet in the way that would trigger it.

Juniper Vale: That's the precise gap. The regulation is real and it's thoughtful — capital requirements that actually flex with the cycle instead of staying static. But synthetic positions through total-return swaps, the way Archegos was built, those don't appear in the place the regulator is looking. The exposure exists. It just doesn't show.

Mark Delaney: And there's this other thing that I keep — uh, wait, because this is the part that kind of scrambles my head. Rising prices make people borrow more. But the borrowing pushes prices higher. So the regulator is trying to read the temperature of the room, except the thermometer is also running the furnace.

Juniper Vale: That's exactly the endogeneity problem. Leverage responds to rising asset prices and causes them. Which means during the boom, when regulators most need a clean signal that things are overheating, the signal itself is being inflated by the leverage they're trying to measure. You can't stand outside it.

Mark Delaney: So — I mean, what do you actually do with that? As a regulator, as a saver, as anyone.

Juniper Vale: I don't know that there's a clean answer. Caps on leverage reduce the fragility — genuinely, that part works. But they also constrain legitimate credit creation. A small business loan is leverage. A mortgage is leverage. You pull too hard on the cap and you've slowed real economic activity that wasn't the problem. The tradeoff doesn't resolve. And then underneath all of that — algorithmic trading, mark-to-market accounting moving daily — the feedback loops are faster than they were in 2008 or even 2020. Whether that means the interval between crises is shrinking, I actually can't tell you. That's the part I can't settle.

Mark Delaney: Yeah. And what gets me is the retirement savings piece. Someone's pension sits inside a leveraged fund they've never heard of and didn't choose in any meaningful sense. That's not resolved by better regulation of prime brokers. That's just... the water they're swimming in.

Juniper Vale: That's where I'll just — yeah. That's where I run out of tidy conclusions. Thanks for working through it with me.

Why borrowing to invest multiplies both gains and drawdowns symmetrically · Onpode