Stock & Flow. Investing where AI meets a physical limit.

Research and a timestamped paper portfolio. Founded by Malte Wagenbach.

Updates

Thesis

Intelligence is becoming a flow. Atoms are still a stock. Over the next decade, money moves from whatever AI makes abundant to whatever AI cannot make faster.

The idea

AI keeps making thinking cheaper. Writing, analysis, code and review get less expensive with every model release. Every unit of that cheap intelligence runs on things that do not scale like software: power, memory, chip packaging, water, metals, explosives for defence, fertiliser for food. Those are stocks. A stock gets dearer as you draw it down, and adding more takes years and billions.

When one input becomes abundant, the scarce input next to it takes the margin. We look for that point and position on both sides of it: long the firm that owns the scarce step, short the firm that has to pay for it.

Why now

How we pick

We do not screen for themes. We start from physics.

  1. Define the unit the buyer needs, such as one firm megawatt-hour for a data centre.
  2. Write the physical chain from raw input to that unit.
  3. Score every link: time to add capacity, number of qualified suppliers, substitutes, capital needed, exposure to hostile states, and share of the end cost.
  4. Find the binding link: long lead time, few suppliers, no substitute.
  5. Find who owns it, then check whether the market already pays for it.
  6. Write down the physical event that would remove the bottleneck. We watch that, not the share price.

We add one more test. Is the link a stock, whose cost rises as it is used up, or a flow, whose cost falls on a learning curve, like sunlight or engineered biology? Bottlenecks on stocks are what we own today. Flow routes near the point where they become cheaper are what we own next.

Six pillars

PillarThe binding link we foundWhat would prove us wrong
ComputeSubstrate materials. One supplier makes over 95% of the build-up film inside every AI chip package, and its next plant opens in 2032.A second film source qualifies, or glass-core substrates scale early.
EnergyLarge power transformers and the electrical steel inside them, with lead times of two to three years. Also turbine blade castings: four foundries at scale, all full.Transformer lead times fall below a year.
WaterA permitted coastal site, not the membrane. Equipment takes one to two years. A permit takes many years, or never comes.Permitting speeds up in California, Chile and southern Europe.
MaterialsCopper mines, which now take close to eighteen years from discovery to output, and heavy rare-earth separation, where China holds about nine tenths of refining.China drops its export controls for good, or new separation capacity outside China arrives early.
FoodSulphur for phosphate, much of it shipped through Hormuz, and cheap gas for nitrogen. US producers pay a fraction of what European plants pay for the same gas.Hormuz reopens and sulphur prices fall back.
SovereigntyEnergetics, not shells. Europe can press shells faster than it can make the nitrocellulose and explosives to fill them. Missiles depend on very few rocket-motor suppliers.A lasting ceasefire combined with fiscal austerity in Europe.

Where we think the market is wrong

Rules

What could make the whole thesis wrong

Contact

ir@alprina.com


Research and a paper portfolio only. Nothing here is an offer to sell or a solicitation to buy any security, and nothing here is investment advice.

This page is plain text on purpose. The time goes into the physics.