# AI capex — X 热门讨论 (2026-10-02 13:42 UTC)
## @greg_ip (Greg Ip) · 10-02 12:27 · ♥52 ↻14 💬5 To justify today's AI capex, we'll have to spend 9% of GDP on AI services, a study finds. Is it plausible we'll spend as much on AI as on food? Twice as much as on energy? The law of diminishing returns would like a word. My column: https://t.co/Vsi9AE3WUC https://x.com/greg_ip/status/2105998096580726973
## @tanayj (Tanay Jaipuria) · 10-01 23:51 · ♥33 ↻8 💬2 Goldman says that ~half of S&P 500 growth in EPS in 2026 is from AI investment.
Hyperscaler Capex this year will be ~$800B (+94% y/y). Goldman expects growth going forward to be more muted at $1.2T in 2027 and $1.4T in 2028. https://t.co/0813UaI4dS https://x.com/tanayj/status/2105807724470751488
## @PhotonCap (Photon Capital) · 10-01 22:45 · ♥30 ↻6 💬1 The Silicon Photonics Foundry Layer: Who Can Actually Make a PIC https://x.com/PhotonCap/status/2105791194173526473
## @KrisPatel99 (Kris Patel 🇺🇸) · 10-02 10:14 · ♥30 ↻2 💬5 We have a K-shaped stock market right now.
Most of equity gains are being powered for the AI names.
Equal Weighted SP500:
$RSP has actually been in retreat for quite a bit. Its about to hit the 200 day MA and RSI and MACD are hitting oversold levels.
Market Cap Weighted SP500:
$SPY has top 20 of companies weighted at 50% of the index.
Even if the AI theme starts to slow down next year or the year after, there could likely be a powerful upward move in the rest of the market thus buffering any major downturn.
The key driver for the rest of the market to pick up would be centered around AI Capex Growth moderation + Iran War resolution. That could drive down yields and boost valuations for Non-AI trade companies. > 引用 @InvestingVisual: The fear & greed index is closing in on extreme fear.
With the market close to an all-time-high.
Make it make sense. https://t.co/dkCltLk7Nc https://x.com/KrisPatel99/status/2105964594460057625