Feb 2, 2026 · 1h 19m · capital-allocators
Jonathan Lewinsohn – Credit Microcycles at Diameter (EP.484)
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gold bands on the timeline = statements, start to end. Hover to read, click to jump. CC turns on captions
In this interview with Ted Seides, Jonathan Lewinsohn, co-founder of Diameter Capital Partners, explores the firm's approach to investing across corporate credit microcycles, private lending, and capital solutions. He analyzes the disruptive impacts of artificial intelligence, shifts in creditor dynamics, and structural opportunities across enterprise software, housing, telecommunications, and healthcare.
How this conversation actually went
Every chapter scored 0–10 on four independent dynamics. Hover any point for the reasoning behind the score. Ted holds 14.2% of the talking time here. How this is scored →
Ted as informed peer 3.7 Guest teaching 5.4 Guest disagreement 0.9 Ted pushing back 0.4
speaking balance: gold is Ted, purple is the guest (3 minute bins)
Sharpest disagreement ▶ 17:35 Reframing Private Credit Threat from Recession to Software Concentration
Lewinsohn directly counters the conventional market worry about cyclical downturns, arguing that the real existential threat in direct lending portfolios is heavy concentration in software facing technological obsolescence.
Hardest push from Ted ▶ 44:41 Challenging Chemical Microcycle as an Equity ShortTed pushes back on Lewinsohn's global chemicals thesis by noting that the scenario described sounds like an equity short rather than a traditional credit opportunity.
Biggest teaching moment ▶ 1:00:10 Muffin Tops and Unwanted Stumps in Insurance CreditLewinsohn uses the Seinfeld 'top of the muffin' metaphor to educate Ted on how Wall Street carves out pristine investment-grade tranches while leaving hazardous residual stumps in retail-facing funds.
Ted holds their own ▶ 38:00 Probing Return on Capital in Credit vs Equity UnderwritingTed demonstrates deep investment expertise by questioning the line between fundamental ROIC equity underwriting and senior credit risk analysis.
the scores for every segment, with the reasoning behind each
| Chapter | Topic | Ted as informed peer | Guest teaching | Guest disagreement | Ted pushing back | Why |
|---|---|---|---|---|---|---|
| Host Travel Message and Episode Sponsors | 0 | 0 | 0 | 0 | Solo host segment featuring introductory remarks, travel tips, and sponsor advertisements for AlphaSense, Intapp DealCloud, and Admired Leadership. | |
| The Evolution and Expansion of Diameter Capital | 3 | 5 | 1 | 0 | Ted opens with a high-level prompt about Diameter's evolution over the past five years. Lewinsohn details the complementary build-out of their CLO and direct lending businesses alongside the flagship hedge fund. | |
| Private Credit Evolution and Capital Solutions Growth | 4 | 6 | 1 | 1 | Ted asks Jonathan to distinguish between direct lending, capital solutions, and other private credit areas. Lewinsohn provides a historical breakdown from the GFC to the emerging 2021-vintage refinancing wall. | |
| Software Concentration and Technological Disruption in Credit | 5 | 7 | 2 | 1 | Ted notes that direct lending has grown rapidly in an untested benign environment. Lewinsohn reframes the risk from generic cyclical recessions to severe industry concentration in software and SaaS under threat from AI. | |
| Analyzing AI Disruption and Software Credit Underwriting | 4 | 6 | 1 | 0 | Ted inquires how credit underwriting differs between resilient and vulnerable software credits. Lewinsohn provides historical analogs (autonomous driving, shale, yellow pages) to illustrate why legacy software is vulnerable to AI-native disruption. | |
| Financing AI Infrastructure and Managing Residual Risks | 4 | 6 | 1 | 1 | Ted presses on AI infrastructure and data center debt underwriting. Lewinsohn outlines the spectrum of risk from fully amortizing hyperscaler-backed facilities to unpriceable chip residual value risk. | |
| The Nature and Opportunity of Credit Microcycles | 4 | 7 | 1 | 0 | Ted asks for a conceptual definition of credit microcycles. Lewinsohn delivers an extensive overview explaining how high leverage combined with technological change or policy shifts drives industry-specific dislocations. | |
| The Frozen Housing Market and Building Products Dynamics | 4 | 7 | 1 | 0 | Ted prompts Jonathan to explore the housing microcycle. Lewinsohn analyzes locked-in low mortgage rates, discretionary vs non-discretionary home turnover, and the coiled-spring opportunity in building products debt. | |
| Sponsor Break: Ridgeline Investment Management Platform | 5 | 6 | 1 | 2 | After an ad break, Ted challenges Jonathan on how his focus on business ROI differs from equity underwriting. Lewinsohn explains that assessing basic return on capital is essential for modern credit selection. | |
| Emerging Microcycles in Telecommunications and Global Chemicals | 4 | 7 | 1 | 0 | Ted asks about other microcycles, prompting Lewinsohn to explain dislocations in telecommunications (fixed wireless vs fiber) and massive Chinese overcapacity moving up the tech stack into specialty chemicals. | |
| Shorting Dynamics and Integrated Platform Risk Management | 5 | 5 | 1 | 1 | Ted observes that the chemicals thesis resembles an equity short rather than standard credit investing. Lewinsohn elaborates on Diameter's shorting philosophy and how hedge fund short insights inform CLO and direct lending risk screening. | |
| Healthcare Microcycle and Policy-Driven Dislocation | 4 | 6 | 1 | 0 | Ted brings up healthcare, and Lewinsohn details how recurrent 4-to-8 year political policy swings, rising wage inflation, and ACA subsidy dynamics create cyclical dislocations in healthcare credits. | |
| The Erosion of Norms and Evolution of Creditor Dynamics | 4 | 7 | 1 | 0 | Ted asks about shifting creditor behavior and aggressive liability management exercises (LMEs). Lewinsohn contrasts contractual credit rights with equity fiduciary duties and discusses the emergence of creditor cooperation pacts. | |
| Repeat Player Advantage in Debt Negotiations and Restructurings | 4 | 6 | 1 | 0 | Ted asks how Diameter's size impacts creditor negotiations. Lewinsohn shares an anecdote about a near-liquidation and illustrates why repeat-player reputation and patience during creditor posturing matter. | |
| Insurance IG Growth and the Risk of Credit 'Stumps' | 5 | 7 | 1 | 1 | Ted asks about insurance company demand for investment grade and private credit paper. Lewinsohn explains the structural bifurcation of asset-backed finance using a 'muffin top vs stumps' analogy to highlight residual risk. | |
| In-House Macro Research and Consumer Spending Insights | 4 | 6 | 1 | 0 | Ted asks how macro analysis informs microcycle investing. Lewinsohn explains Diameter's in-house macro modeling, the underlevered consumer dynamic, and anomalous micro trends like packaging weakness. | |
| Scale, Relevance, and the Integrated Credit Flywheel | 4 | 6 | 1 | 1 | Ted questions how Diameter competes against mega-managers like Apollo with $450B+ AUM. Lewinsohn argues that transactional relevance and integrated cross-market presence matter far more than gross scale. | |
| Strategic Investment Spotlight: Ascension Data | 3 | 3 | 0 | 0 | Ted introduces a sponsor spotlight on Ascension Data before conducting closing personal questions regarding hobbies, early jobs, Zoom etiquette, and long-term societal mysteries. | |
| Episode Conclusion and Institutional Disclaimer | 0 | 0 | 0 | 0 | Brief standard podcast outro and voiceover institutional disclaimer. |
Statements from this episode (31)
Lewinsohn: Leveraged loan quality dropped as high yield quality improved
“As high yield has become higher quality, levered loan market is often lower quality.”
Lewinsohn: Direct lending shifted from overhyped to underrated
“Direct lending, which is a big part of what we do now, got very hyped up. Everyone's saying, oh, you have to do it, whether it's allocators, investors, GPs. And now has gone all the way to the point that people are so afraid of it. They miss what's great about…”
Lewinsohn: RSA, Ivanti, McAfee, and Barracuda face syndicated loan distress
“RSA, Avanti, McAfee, Barracuda, they'll have their own issues going through LME.”
Lewinsohn: Software accounts for 30% of direct lending portfolios
“You do have 30% of direct lending in the software space.”
Lewinsohn: Diameter caps direct lending software exposure under 10%
“We've spent a lot of time making sure that we have sub 10% of our direct lending business in that space”
Lewinsohn: Software concentration is the biggest threat to direct lending portfolios
“The biggest threat is industry concentration in software going to impact portfolios in a way that wasn't expected when they were under it.”
Lewinsohn: AI agents make too many errors for enterprise prime-time deployment
“Agents are working well doing a lot of things, but they're 98%. They make mistakes. AI's not there yet for prime time, so we can't predict where it's going to go.”
Lewinsohn: Hyperscaler-guaranteed amortizing debt is the data center gold standard
“The gold standard is financing a box, a data center that is being used by a hyperscaler, being guaranteed by a hyperscaler that amortizes.”
Lewinsohn: Diameter avoids long-term residual risk in AI infrastructure financing
“We've not financed long-term residual risk. We think it's been too hard for us, but this is America. Everything can be trunched. We've invested at the top of the capital structure in an amortizing way.”
Lewinsohn: Hertz's post-bankruptcy crisis stemmed from Tesla residual value collapse
“Hertz had a problem coming out of their restructuring that they had too many Teslas. It wasn't only that people didn't want to rent Teslas. I think people found Tesla's interesting to rent. They're great cars. The problem was the residual value was much worse …”
Lewinsohn: Distressed debt's best opportunities come from sector microcycles
“What it means is the best opportunity for distressed has been micro cycles.”
Lewinsohn: US consumers and corporates have been historically under-leveraged
“Part of the reason we've been more bullish on the economy than some others over the last few years is the U.S. Consumer and the corporate have been historically under levered.”
Lewinsohn: Non-discretionary moves drive 3 million of 4 million annual home sales
“We think that the non-discretionary moves are about three million of the four million. Which means we only have a million homes per year where people are saying, hey, I got a better job in Cincinnati. I'm taking it.”
Lewinsohn: US housing market is a coiled spring that must rebound
“We see housing as this coiled spring. It has to come back. There has to be more dynamic movement in the housing market.”
Lewinsohn: Building products earnings expectations have capitulated, setting up outperformance
“Building products in particular, earnings expectations have really capitulated in 26, which could create interesting environment for outperformance.”
Lewinsohn: Telecom has been Diameter's most active and profitable microcycle since COVID
“We've seen that telecom has been the microcycle that we've prosecuted the most since COVID, that's been incredibly profitable, and with limited bankruptcies.”
Lewinsohn: Pure bankruptcy knowledge edge in distressed debt has competed away
“Distressed at investing was such a frontier, say at least 25 years ago, even before the financial crisis. You didn't need to really care if it was a sock company or a steel company. You knew bankruptcy. The other guys didn't. That has been competed away and is…”
Lewinsohn: Credit losses correlate with over-relying on capital structure seniority
“Will we invest in a business that we don't think is amazing because we think it's good enough where we are in the capital structure? Certainly. But if I look back at places where we've lost money and credit, do they line up in those type of situations more oft…”
Lewinsohn: Fixed wireless drove 150% of US broadband growth last year
“It was a 150% of the growth last year in broadband across the country.”
Lewinsohn: Legacy cable faces market share erosion from fiber and fixed wireless
“What we think is going to happen in telecom is more and more legacy, perhaps coaxial companies are going to be impacted by not only fixed wireless share, but fiber as it get laid all over the country. And that fixed wireless is like a transitionary technology …”
Lewinsohn: Chinese expansion will drive severe chemical market overcapacity by 2030
“If you look at the amount of ethylene and propylene that they're bringing on, and then go to 20 30 and shut all of the European and Japanese capacity, in 2030, you'd have more over capacity than you have now.”
Lewinsohn: Diameter avoids single-product and single-payer healthcare businesses
“And so we tend to stay away from things that are single product or single payer. We like it. If there's a mix of commercial Medicare and Medicaid, we like larger businesses.”
Lewinsohn: US commercial healthcare costs rose 7.5% and employer costs 7%
“Last year, you saw healthcare costs up across the board, commercial healthcare costs up seven and a half percent, employer payment for healthcare up seven percent.”
Lewinsohn: Credit is governed strictly by contract law, not fiduciary duty
“In credit, that doesn't really exist. The way the law has worked is, it's a contract. It's not being analyzed under fiduciary duties law. It's not being analyzed under what the securities laws say about fiduciary duties. It's contract. What does the contract l…”
Lewinsohn: Creditor cooperative agreements surged in popularity over the last 18 months
“One thing you're seeing is co-ops, which are cooperative agreements between creditors to say, we're not going to do a deal with the company alone, neither should you, have really come into vogue over the last 18 months.”
Lewinsohn: Repeat players receive different treatment in credit restructuring
“If you're a repeat player, then the market treats you differently than if you're a one-time player.”
Lewinsohn: Wall Street is running out of places to hide credit residuals
“We think that Wall Street is getting a little short on places to stick the stumps. They're coming up in special situations funds. They're coming up in interval funds. They're coming up in places that people may not appreciate what happens when you're not getti…”
Lewinsohn: Private asset-backed risks will hurt specific funds, not the global economy
“I don't think that it would create systemic problems. Just like every hedge fund in the world wants to call a recession constantly because they're desperate for the volatility. Everyone wants to constantly say, what's the next systemic thing? Because the impac…”
Lewinsohn: Top 25% of earners drive ~50% of US durables and services spending
“In places like durables and services, the top 25% are responsible for, say, 50% of the spending.”