Part 2 of the India Energy Growth Series | Continuing from : Is India’s Economic Growth Still Structurally Tied to Fossil Energy?

In the previous part of this energy series, I explained how an immediate supply shock to a fossil fuel like coal can trigger a persistent negative trend in GDP and no, that topic wasn’t chosen out of pure luck. Consider it a warm-up.

Because here we are. If you’ve recently stood in front of your stove wondering why the gas isn’t coming, you might want to start thinking about things from Iran’s perspective. The brewing crisis around the Strait of Hormuz has made that abstract econometric story very, very real and very domestic.

With this post, I’ve updated several parameters in the model to account for the escalating situation unfolding in the Persian Gulf, and what it means for an economy that imports nearly 90% of its crude and calls a closed strait a supply chain.

The Strait That Broke Your Morning Chai

Key Highlights

1. Closure of the Strait of Hormuz has triggered an immediate supply shock for India, exposing its heavy dependence on imported crude and causing visible disruptions like LPG price hikes and delivery delays
2. The crisis affects India through two simultaneous channels: (i) trade disruptions via delayed and costlier imports, and (ii) rising energy import costs, both of which increase production costs across industries
3. In the long run, India’s industrial growth is driven more by capital investment than energy imports, with declining energy intensity showing improved efficiency over time
4. In the short run, rising costs worsen energy intensity (higher cost per unit of output), which has a strong negative effect on industrial output and appears with a lag of 1–2 quarters
5. The duration of the disruption is crucial: a short shock can self-correct, but if it lasts beyond a few months, it risks becoming a structural slowdown through inventory depletion, cost lock-ins, and reduced production planning

The Situation

On February 28, 2026, coordinated US-Israeli strikes on Iran effectively shut the Strait of Hormuz — the narrow chokepoint carrying one-in-three barrels of crude traded by sea globally. Brent crude surged 11–15% overnight, analysts warned of $100–150 per barrel, and India, which imports nearly 90% of its crude with half of that transiting Hormuz, has fewer than 30 days of strategic reserves to show for itself. The consequences arrived almost immediately: LPG prices jumped ₹60 per cylinder, only 1-in-10 Bengaluru hotels received their March 10 gas delivery, and Mumbai saw commercial refill delays stretching eight days. The government invoked the Essential Commodities Act. In the previous part of this series, I showed how an energy supply shock triggers a persistent GDP drag that doesn’t correct quickly. What you’re seeing right now is exactly that — the empirical evidence just decided to show up early, uninvited, and right next to your gas stove.

This Is Bigger Than an Oil Price Spike

The Hormuz closure is hitting India through two channels simultaneously, and separating them matters.

The first is trade and raw material supply. The Gulf corridor carries not just oil but the metallurgical inputs, petrochemical feedstocks, fertilisers, and industrial chemicals that Indian factories depend on (Ministry of Commerce, 2025). Vessels diverted around the Cape of Good Hope add 10 to 14 days of transit and sharply higher freight costs (BIMCO, 2026; Baltic Exchange, 2026). India’s merchandise trade with the Gulf exceeded $59 billion in FY2024-25, and the strain is already showing up in port congestion at Mundra and Nhava Sheva (Indian Ports Association, 2026). For industries running on just-in-time delivery, a two-week delay is not a scheduling inconvenience. It is a production stoppage waiting to happen.

The second channel is energy imports specifically, and this is where my research connects directly. India’s factories have kept running since the closure. But a buffer is not a shield. As imported energy becomes more expensive and harder to source, the cost of running India’s industrial base rises with it. The central question my research set out to answer is whether India’s industrial sector has structurally reduced its dependence on imported energy enough to absorb a shock of this magnitude. The answer is more complicated, and more interesting, than a simple yes or no.

What Is Actually Driving India’s Industrial Growth? The Answer Is Not What You Think

The Long Run: Investment Has Replaced Imported Energy as the Engine

Three decades of data, 1990 to 2023, deliver a finding that sounds almost too contrarian to be true: the thing driving India’s industrial output is not the fuel arriving at its ports. It is the machines, technology, and infrastructure being built with every rupee of capital investment. The top-right chart makes this almost evidently visual: capital investment and industrial output move in near-perfect lockstep across the entire sample, two lines so closely tracked they look like they were drawn by the same hand. A sustained 1% increase in that investment is associated with a 0.37% rise in long-run industrial output, a relationship that survived every statistical stress test thrown at it. Energy imports, meanwhile, showed up to the regression, contributed nothing meaningful, and quietly went home. The top-left chart shows exactly why: as industrial output climbed steadily from 1990 onward, energy intensity (how much imported energy India needs per unit of output) actually fell. The economy learned to do more with less, and the data captured it.

To be clear, imported energy is not irrelevant. It is the floor, the baseline that keeps the lights on and the blast furnaces warm. But it is no longer the variable that explains whether India grows or stalls. The bottom-left chart reinforces this: coal electricity’s share has become increasingly erratic relative to industrial output, the two lines visibly diverging after 2010 as India’s industrial base stopped needing coal to scale. And the bottom-right chart marks the precise moment this structural shift took hold: a dashed line at 2003, where the trajectory of India’s log industrial GDP bends visibly upward and never looks back.

The Short Run: Something to worry about

The short-run story is where things get uncomfortable. The model identifies energy intensity as one of the sharpest drivers of short-run industrial performance, with a coefficient of −0.37. The top-left chart captures the long-run trend of improving efficiency, but that trend is not a guarantee. It is a direction, and the Hormuz closure is actively pushing against it. When energy intensity worsens, when the economy is forced to spend more imported energy per unit of output, industrial growth takes a measurable and immediate hit. That is precisely what is being engineered right now by rising freight costs, delayed inputs, and compressed margins across India’s production chains. The long-run charts show where India has been heading. The short-run coefficient tells you what happens when something forces it off that path.

How the Hormuz Closure Is Worsening India’s Energy Intensity Right Now

The short-run results of the model explain something that the headlines have largely missed. India’s factories kept running after the strait closed. So where exactly is the damage, and when does it arrive?

Here is the mechanism, step by step.

Freight costs spike first. Every imported input, raw materials, feedstocks, industrial chemicals, now arrives 10 to 14 days later and significantly more expensive. That additional cost does not sit at the port and wait. It moves through the entire production chain, touching every stage between raw material and finished product. A factory consuming the exact same amount of energy as it did in January is now spending considerably more per unit of output, because everything feeding into its production process has become harder and costlier to source. Its energy intensity has worsened without a single additional unit of energy being consumed. The ratio has shifted, and the short-run results say clearly that is enough to drag output downward.

Margins then compress and output decisions follow. Manufacturers facing higher costs per unit are left with two choices: absorb the hit and watch profitability erode quarter by quarter, or scale back output to protect margins. Neither choice is painless. Both push the energy-to-output ratio further in the wrong direction. And both show up in industrial output data one to two quarters from now, not today, which is precisely why the damage feels invisible at this moment. The crisis is working through the system quietly, and the bill arrives later.

How Long Does India Have Before This Becomes permanent?

The model estimates that about 34% of a short-run shock like this corrects itself within a year. If the strait reopens within weeks, input costs normalise, efficiency ratios recover, and India absorbs a visible but temporary dent in industrial output. Painful, but manageable.

If the disruption extends beyond three to four months, the picture changes entirely. Inventory buffers exhaust themselves. Freight premiums get locked into annual procurement contracts. Manufacturers revise production targets downward for the next financial year. The correction mechanism slows, and what started as a short-run efficiency squeeze begins hardening into a structural drag. The model gives India roughly a one-year window to absorb this cleanly. That window is already running.

How India Quietly Rewired Its Industrial Economy: The 2003 Turning Point

The decoupling between imported energy and India’s long-run industrial growth did not happen gradually. It happened at a specific, identifiable moment. When I ran the structural break tests on the data, both independently flagged the same narrow window: 2003 to 2004. A structural break, in simple terms, is the point where an economy stops following its old rules and starts following new ones, and the fact that two separate statistical methods agreed on the same date without any guidance from me is not a coincidence. It is the data pointing at something real.

Two things happened simultaneously at that moment that permanently changed how India’s industrial sector relates to imported energy.

The first was the Electricity Act of 2003. Before this law, manufacturers had no choice but to draw power from State Electricity Boards, inefficient monopolies that delivered unreliable electricity at punishing tariffs. The 2003 Act changed that entirely. It opened up transmission networks, allowed private power generation, and let industries build and operate their own power plants (Prayas Energy Group, 2003). A steel plant could now generate its own electricity, bypass the grid completely, and cut its dependence on centralised imported fuel supply chains. The insulation that India’s factories are benefiting from today, the reason blast furnaces kept running after Hormuz closed, traces directly back to that single legislative decision made over twenty years ago.

The second was the investment boom that followed almost immediately. Between 2004 and 2008, India grew at over 8% per year, the highest sustained rate in its history, powered by record levels of capital formation (World Bank, 2024). Investment replaced imported fuel as the primary engine of industrial productivity, and that shift is exactly what the model is detecting in the data. The other candidate break dates, 1994, 1999, 2009, and 2015, were each tested and rejected. The early ones reflect service sector changes, not industrial restructuring. The 2009 break is simply the global financial crisis. And 2015 falls too late in the sample to allow reliable estimation on both sides. The 2003 break is the one the data keeps returning to, and the history explains exactly why.

In conclusion

Three things emerged clearly from this research, and the Iran crisis has made all three more urgent than they were when the analysis began.

India’s industrial growth has structurally decoupled from imported energy at the margin. It is weak, but that is the right path. Capital investment, not fuel volume, is what is driving industrial output over the long run. That shift is three decades deep in the data and rooted in a regulatory transformation most people have never heard of.

In the short run, the decoupling does not protect India from a crisis like this one. The Hormuz closure is worsening energy intensity through rising input costs and compressed margins, and that shows up in industrial output data one to two quarters later. The insulation is real but it is not infinite, and the clock is running until the effect becomes permanent.

And the gap between the long-run story and the short-run reality is exactly where India’s vulnerability lives. The factories are still running. The question the next few quarters will answer is how long that remains true.