Hedgie(@HedgieMarkets):🦔That's a lot of eggs in one basket. To put it simply…out of every $100 invested in US stocks, about $42 is in just ten companies, and all ten depend on the same AI bet. If you have a 401k, you probably own a big piece of that whether you meant to or not. Railroads changed the whole country too, and plenty of people who bought near the top still lost their shirts, mostly because the companies borrowed too much to lay track before the traffic actually showed up. AI might turn out better than that, maybe. I'd just feel better if ten companies weren't carrying close to half the market. Hedgie🤗

2026.10.08 05:00

🦔That's a lot of eggs in one basket. To put it simply…out of every $100 invested in US stocks, about $42 is in just ten companies, and all ten depend on the same AI bet. If you have a 401k, you probably own a big piece of that whether you meant to or not. Railroads changed the whole country too, and plenty of people who bought near the top still lost their shirts, mostly because the companies borrowed too much to lay track before the traffic actually showed up. AI might turn out better than that, maybe. I'd just feel better if ten companies weren't carrying close to half the market. Hedgie🤗

The Kobeissi Letter@KobeissiLetter

2026.10.08 02:43

BREAKING: The "AI Big 10" now accounts for a record 42% of US stock market cap. This includes Magnificent 7 stocks as well as Broadcom, $AVGO, AMD, $AMD, and Micron, $MU. This figure has more than doubled since the 2022 bear market low. By comparison, during the 2000 Dot-Com Bubble, the Technology, Media & Telecom (TMT) sector peaked at 41%, while the Nifty Fifty peaked at 40% in the 1970s. Furthermore, Japan’s equity market bubble in the 1980s peaked at 44%. In the past, only railroad stocks have significantly exceeded this concentration, accounting for 63% of US market cap at their highest point in the 1900s. The dominance of Big Tech is extraordinary.