Why I Invest Through the Lens of Industry Chains

Over the years, one habit has become central to how I research investments: before anything else, map out the industry chain.

The reasons are simple —

1. Value is never evenly distributed along a chain. Within the same industry, some segments capture most of the profit (advanced process nodes and HBM in the AI chain, for instance), while other bustling segments earn thin margins for years. Without taking the chain apart, it's easy to mistake "a hot industry" for "everyone makes money."
2. Change always starts somewhere specific on the chain. Technology transitions, supply-demand mismatches, localization waves — every big theme ultimately lands on a few concrete segments. Only with the structure in hand can you locate where the change is happening.
3. A company's ceiling is set by its segment. Even the best management team can rarely escape the competitive structure and bargaining position of the segment it operates in. Picking the segment before picking the stock is the first filter for better odds.

This site, Industry Chain Atlas, turns that habit into a product: interactive tree maps of AI, robotics, commercial space, electric vehicles and semiconductor equipment, unfolding from end applications all the way down to equipment and materials, with key companies marked on every segment.

This blog is the atlas's footnotes: investment lessons learned while maintaining the maps, observations on shifting market conditions, and tracking notes on segments whose competitive structure is in motion. The atlas covers structure; the blog covers change. Research is only complete with both.

Comments and corrections are welcome at contact@industrychain.net.