Concentration With Earnings
Technology concentration is easy to dismiss as another bubble. Sometimes markets do run ahead of reality. But the current wave is different in one important way: much of the concentration is supported by real earnings, real margins, and real revenue rotation into the firms that control digital infrastructure.
The issue is not simply that a few stocks are valuable. It is that a growing share of economic life depends on the systems those firms own: cloud, chips, app stores, search, advertising, identity, operating systems, commerce rails, and now AI interfaces.
Technology share of U.S. public equity markets, 1900-2025
Broad technology concentration compared with the strict IT sector share.
Why This Concentration Matters
Economic concentration becomes civic concentration when the same firms mediate speech, labor, commerce, attention, and knowledge. A platform can decide what is visible. A marketplace can decide who reaches customers. A model provider can decide which frameworks are easy to access. A cloud provider can decide who can scale.
That is a different kind of power than ordinary corporate size. It is infrastructural power.
The Intelligence Layer
AI intensifies the question because intelligence is becoming a production input. The firms that provide intelligence through APIs, assistants, chips, and cloud systems may sit upstream of an enormous share of future work.
If the highest-value input in the economy becomes rented from a few providers, ordinary businesses and workers may become more productive but less independent.
What To Watch
The answer is not to punish success. It is to watch where dependency forms. Can users leave? Can businesses compete without buying access from the same few intermediaries? Can local institutions choose tools aligned with their values? Can workers build portable skill rather than permanent dependency?
A free economy needs innovation. It also needs room for ordinary people to own, build, bargain, and exit.