Most people inside
#PostonTradFi still think they own “the market” through ETFs.
But if you look at the actual numbers inside modern
#TradFi , a huge percentage of index performance now comes from a very small group of companies.
In 2025, the Magnificent 7 accounted for an unusually large share of the
#SP500 ’s gains and market capitalization growth. That means millions of people buying “diversified” index funds are often getting heavily concentrated exposure to the same few tech giants without fully realizing it.
And this creates a strange new market structure.
When money flows into passive ETFs, more capital automatically moves into the largest companies simply because of their index weight. The larger they become, the more passive capital keeps buying them.
That is very different from traditional price discovery driven mainly by fundamentals.
In some ways, modern
#markets are starting to resemble gravity systems where capital naturally collapses toward the biggest corporate objects.
Historically, concentration happened through monopolies controlling oil, railroads or telecom infrastructure.
Now concentration may increasingly happen through ETF mechanics themselves.
#ETFs