The Hidden Plumbing of Commodity Finance — Odd Lots (2026-06-01)
view source ↗The Hidden Plumbing of Commodity Finance — Odd Lots (2026-06-01)
Guest: Lewis Hart, Head of Corporate Advisory and Banking, Brown Brothers Harriman (BBH) Recorded: May 27, 2026 (published June 1, 2026)
Show notes
Commodity finance is a $4–5T specialized subset of global trade finance ($20T). BBH is one of the few US specialist commodity banks; European banks have largely exited post-Basel III/IV. The conversation covers how commodity credit lines work, price risk and futures hedging, warehouse collateral, Strait of Hormuz disruption impact, and whether compute could become a futures-traded commodity.
Transcript
Tracy Alloway: Hello and welcome to another episode of the All Thoughts podcast. I'm Tracy Alloway and I'm Joe.
Joe Weisenthal: Why isn't thal Joe? ... I get it. It seems fun, it seems real. It seems like one of the few areas of finance that's not just a screen.
Tracy Alloway: One aspect of commodities I never really appreciated was how much financialization there actually is in the market ... I struck me that we have never actually done a commodity financing episode.
Joe Weisenthal: I'm really interested in this because again, like capital efficiency is very important. If I don't want to tie up all of my capital, I want to put down a fraction, borrow the rest, pay off that loan when the ship gets there. This is just like first principles.
Tracy Alloway: Today we are going to learn about commodity finance. We're also going to try to get a handle on what's going on in the commodities world right now, given some of the disruptions that we've seen. We're speaking with Lewis Hart.
Lewis Hart: Thanks Tracy, Thanks Joe, it's great to be here.
Tracy Alloway: What's commodity finance? What exactly are we trying to achieve here?
Lewis Hart: It's the biggest twenty trillion dollar market that no one talks about. Global trade in goods — about twenty trillion dollars — goes through trade finance programs. Commodity finance is a specialized subset, about four or five trillion dollars. So it's a huge market that doesn't get more headlines because it's not that glamorous. It's kind of boring, and so when things go well, it doesn't really create the drama that headlines are seeking.
Tracy Alloway: Okay, so what is a canonical example of a consumer of commodity finance?
Lewis Hart: The typical consumer is a physical merchant — in the energy space, the metal space, or the agricultural space. Their job is not to speculate on prices. Contrary to popular belief, they are essentially supply chain managers. That's their role. And they are the largest consumers of commodity finance.
Joe Weisenthal: What are they purchasing from the bank?
Lewis Hart: Essentially the basic product is a secured line of credit, and that line of credit can be used to buy eligible commodities. It's self-liquidating — once you make the loan, you know what the client's buying and you know what the source of repayment is. It's very short term, secured by inventory, and when the inventory is sold, it's secured by the account receivable. The big variable that is always tricky is what's the price of that commodity at the time of the loan. These structures are designed to give clients flexibility to buy the copper whether it's $6 a pound, $4 a pound, $7 a pound. It's hard to predict these capital needs.
Tracy Alloway: You brought up coffee just then — if you're doing due diligence for a loan, what factors are you taking into account? Would you look at the quality of the warehouse?
Lewis Hart: Absolutely. You'd have location eligibility requirements — I will lend against coffee in this warehouse, this warehouse or this warehouse, but not this warehouse. That's a big part of your diligence. But the bigger risks are: price risk, counter-party risk, international risk, and — the one Brown Brothers Harriman particularly focuses on — management: the character of the borrower. We have something called the five C's of credit: character, collateral, capital, conditions, and the most important one is character. Character is really what matters when markets get volatile.
Joe Weisenthal: So obviously in the backdrop of this conversation is the closure of the Strait of Hormuz. We all know oil flows through the strait. There's a futures market for oil. Pistachios also flow through the strait. There's no pistachio futures. Do you do commodity finance for commodities that don't have hedging instruments?
Lewis Hart: We are active in lots of non-hedgeable commodities — cashews is a good example, pine nuts. So we definitely do.
Joe Weisenthal: How does that change the calculus when that instrument doesn't exist?
Lewis Hart: So thinking about what's happening in the strait — first, we're not the largest player in the Middle East. But I think what we're interested in, in the lens of a commodity banker, is how much capital is actually trapped. Because our business relies on turning over your balance sheet. The fundamental principle is that self-liquidating nature. And right now there is a lot of capital stuck in the strait — something like fifteen hundred commercial vessels. That's tens of billions of dollars, maybe more than one hundred billion. And when all that gets trapped and you potentially have margin calls related to hedges on those inventories, that can really strain your liquidity.
Think about an Aframax vessel — typically seven hundred thousand barrels of oil. For February twenty-eighth, the cost of that shipment might have been forty, forty-five million dollars. Today it's more like seventy, seventy-five million dollars. Overnight, the cost of your single shipment went up significantly. And how do you finance that? You need a bank that can be flexible enough to write a line of credit that allows you to do financing under those guidelines.
Tracy Alloway: How are banks actually handling this? The cost of shipping has gone up, the value of the underlying collateral has also gone up, but balance sheets are more restricted if there's huge sums already tied up.
Lewis Hart: Going back to COVID and then Russia-Ukraine — first you had the huge supply chain disruption, then the Russian invasion of Ukraine. Companies didn't forget about those things, so commodity merchants went out and raised more capital so they were ready for the next exogenous event. They're coming into this crisis well-funded. So far things are working okay — there's no evidence things are breaking. If this lasts for months and months, who knows where it goes. But right now the system is functioning well. Actually, the banks are supportive, the commodity merchants are dealing with the liquidity needs. They have enough liquidity. We haven't heard of any major issues yet. But it's a matter of time — if the strait doesn't open sooner, then you could see big strains because there's so much trapped capital.
Joe Weisenthal: [On the idea of compute futures] There's not a super liquid trucking futures market. From memory — is the chip price change a one-time readjustment, or a permanent fixture? Because answering that question would be an important part of whether it's worth building out a futures market.
Lewis Hart: If you look at the origin of futures markets, it was designed to help farmers manage price risk. The properties that matter: how homogeneous is the product, and volatility. Memory chips and compute are extremely volatile right now. We've been thinking a lot about whether that's a good candidate for a futures contract. If you're a fab producing chips right now, you love the price you're getting — could you lock that in? On the other side, if you're an electronics consumer of chips, you'd love to hedge that price. I actually think it's a great candidate for the futures market. Whether it takes off, I'm not sure, but I know some of the exchanges are spending a lot of time on this.
Lewis Hart on copper and AI:
"I think part of the big story with compute, by the way, that's underfollowed, is copper. So I think everyone talks about the power — power is really important and there needs to be lots of power capacity in order to build the AI revolution. Copper is as important. And you see copper prices at record highs largely because of how much copper data centers are consuming because of all the electrical capacity that needs to be in that infrastructure."
Tracy Alloway: [On new trade routes from Hormuz closure] Are you seeing new trade routes being established?
Lewis Hart: Yes. We saw that starting with the Houthi issue in the Red Sea. Voyages from Shanghai to northern Europe used to go through the Suez Canal. Now they're routing around the Cape of Good Hope. That's adding ten, fifteen, maybe more shipping days, which adds to the working capital requirement, adds to the cost, the day rate on the ship, the insurance. And I would guess if the Strait of Hormuz conflict continues much longer, there's going to be a lot of creativity in terms of how to discharge cargoes from those ships and export them in some other way. I would imagine if I were Saudi Arabia, I'd be thinking about building pipelines going in the other direction. Even if it does subside, I think people are still going to want to find alternatives, because we've realized how reliant we are on this one choke point.
Joe Weisenthal: We're recording this May twenty-seventh, so tomorrow will have been the three-month start of the war. It's become this interminable thing that's part of the background. We're so deep into it that it feels like it's probably going to be closed a year from now. It just has this feeling of permanence now.
Tracy Alloway: This seems to be the overriding theme of this entire shock — it's okay now, but a few months more, the longer it goes on, the more problematic it becomes.