Latest / The Productivity Podcast with Fexingo: Output, Efficiency, and Long-Term Economic Growth / How the Panama Canal Expansion Changed Global Trade
Transcript
- Lucas: So, Luna, I was looking at shipping data from the first half of 2026, and something jumped out at me. The Panama Canal handled more tonnage in June than in any single month since its expansion opened a decade ago. Luna: That's interesting. But isn't the canal still dealing with the aftermath of those drought-related restrictions we saw a couple of years back? Lucas: Right, and that's exactly the story. The drought in 2023 and 2024 forced the canal authority to cut daily transits dramatically, and that exposed just how much of global trade had come to depend on this single chokepoint. But by mid-2026, they've recovered, and the expansion is finally showing its full potential. Luna: It's funny you mention that, because a few listeners have told us they enjoy these deep dives into how infrastructure shapes the economy. And honestly, a small group of them chip in monthly through buy me a coffee dot com slash fexingo, and that's literally what keeps this show running ad-free. Lucas: Yeah, we don't have sponsors, and that means we can spend ten minutes on a topic like the Panama Canal without worrying about ad breaks. So if that's something you value, the link is there if you want to support us. But let's get back to the canal. Lucas: The expansion, which cost over five billion dollars and wrapped up in 2016, added a third set of locks. That allowed what they call Neopanamax vessels — ships that can carry up to fourteen thousand containers — to pass through. Before that, the biggest ships were capped at about five thousand containers. Luna: So that's nearly triple the capacity per ship. I remember reading that the expansion was supposed to change the economics of shipping between Asia and the US East Coast. Did it actually deliver? Lucas: It did, but the shift took longer than predicted. For the first few years, carriers were hesitant to commit to the bigger ships because they needed deeper ports and bigger cranes on the US side. But by 2020, ports like Savannah and Charleston had invested heavily, and suddenly the Neopanamax ships became the standard on that route. Luna: So the canal expansion didn't just change the canal — it forced a whole chain of investments across the US port system. Lucas: Exactly. And that's the productivity story. The bigger ships mean lower cost per container, but only if the entire network adapts. The ports that did adapt saw massive gains in throughput per worker. Savannah, for example, went from handling about three million containers a year in 2015 to over five million by 2025, and it did that without a proportional increase in staff. Luna: That's a concrete number. So the productivity gain isn't just about the ship size itself, but about the whole system being redesigned around it. Lucas: Right. And one of the biggest beneficiaries was liquefied natural gas exports. Before the expansion, LNG tankers couldn't fit through the canal. Now they can, and the US Gulf Coast has become a major supplier to Asia. That's a trade flow that barely existed before 2016, and it's now a cornerstone of US energy exports. Luna: I hadn't thought about that. So the canal expansion essentially opened up a new market for US energy. That's a huge structural shift. Lucas: It is. And it's also why the drought restrictions in 2023 were such a big deal. When the canal had to cut daily transits to around twenty-two ships, LNG carriers were among the ones that got priority, but even then, some had to reroute through the Suez or around the Cape of Good Hope. That added weeks to transit times and spiked shipping costs. Luna: So the expansion increased the canal's strategic importance, which means when it has a bad year, the global supply chain feels it more acutely. Lucas: Exactly. And that's the paradox. The expansion made the canal more efficient, but it also made the world more dependent on it. The drought was a reminder that infrastructure isn't just about capacity — it's about resilience. Luna: So what's the long-term productivity angle here? Is the canal expansion a one-off boost, or does it keep paying dividends? Lucas: I'd argue it's still paying off. The canal authority has invested in water-saving basins and is exploring reservoirs to mitigate drought risks. And on the US side, ports are still upgrading to handle even bigger ships. There's talk of a new class of vessels, sometimes called 'mega-Neopanamax' — not official yet — that could carry up to sixteen thousand containers. If that happens, the productivity gains continue. Luna: So we're not at the end of this story. The canal expansion set off a chain reaction of investments that's still unfolding. Lucas: Exactly. And the lesson for any business is that a single infrastructure investment can have ripple effects for a decade or more. The companies that anticipated the shift — the ports that deepened their harbors, the logistics firms that bought bigger cranes — they captured the productivity gains. Those that didn't were left behind. Luna: That's a great example of how infrastructure decisions shape competitiveness. I'm thinking about the US rail network too. Did the canal expansion affect that? Lucas: Huge. Before the expansion, a lot of Asian cargo destined for the US East Coast would land on the West Coast and then take the train across the country. Now, more of that cargo goes straight through the canal and lands on the East or Gulf Coast. That's changed the economics for rail operators like Union Pacific and BNSF, who now focus more on domestic intermodal and less on transcontinental imports. Luna: So the canal didn't just create winners — it reshuffled the whole map of US logistics. Lucas: Right. And the same thing happened on the US East Coast. Ports like New York and New Jersey had to deepen their channels to accommodate the bigger ships, and that cost billions. But they did it because the alternative was losing market share to Savannah or Charleston. So the expansion didn't just benefit the canal — it forced a wave of public and private investment across the country. Luna: And that investment is a productivity boost in itself, because newer infrastructure tends to be more efficient. Do you have a sense of how much total investment the canal expansion triggered? Lucas: It's hard to put an exact number on it, but by the early 2020s, US ports had spent over ten billion dollars on deepening and equipment. And that's just the port side. Add in rail and warehouse investments, and it's probably double that. So the canal's five billion dollar project triggered at least twenty billion in follow-on investment. Luna: That's a powerful multiplier. So the canal expansion was almost like a catalyst for a whole infrastructure upgrade cycle. Lucas: Exactly. And that's a lesson in how public investment can crowd in private investment. The canal authority took the risk, and private companies followed. That's how you get long-term productivity growth. Luna: So, looking ahead to the rest of 2026, what should we be watching for with the canal? Lucas: The big thing is whether they can maintain the higher transit numbers without another drought crisis. They've added water-saving measures, and they're building a new reservoir, but it's not done yet. If they can keep it running at full capacity, we'll see more trade shifting from West Coast to East Coast routes, which could have long-term implications for port employment and regional economies. Luna: So it's a live experiment in how infrastructure resilience affects trade patterns. That's a great reason to keep an eye on it. Lucas: Absolutely. And I think the broader takeaway is that productivity gains from big projects often take a decade to fully materialize. The canal expansion was a bet in 2016, and we're only now seeing its full impact. That's a good reminder for anyone evaluating infrastructure projects today. Luna: That's a solid note to end on. Thanks for walking us through it, Lucas.