Everyone loves tech stocks right now. That’s exactly what worries me about the next 10 years.
u/PanicBubbly9353 ·
Reddit — r/ValueInvesting
· August 21, 2026 at 07:38
· ⬆ 15 pts
· 💬 44 comments
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Summary
Post warns that crowded tech/AI/Nasdaq-100 trades are trading at historically extreme valuations: Nasdaq-100 ~30x earnings, S&P 500 CAPE near 40.
Author’s thesis: even if AI succeeds and tech profits keep growing, today’s high starting valuations will likely produce disappointing long-term returns for index buyers.
Quality: Thoughtful valuation-based caution, but more macro/valuation speculation than detailed fundamental DD.
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Right now it feels like everyone is buying the same things: tech stocks, semiconductors, “AI stocks,” Nasdaq 100, QQQ.
And at the same time, the Nasdaq 100 is trading around 30x earnings, while the S&P 500 CAPE ratio is getting close to 40.
Both are historically expensive. You basically have to go back to the peak of the dot-com bubble to find clearly more extreme valuations.
That doesn’t mean tech stocks have to crash tomorrow. They could keep going up for quite a while.
But I think people are confusing a great technology with a great price.
AI can completely change the world. Semiconductor demand can keep growing. The largest tech companies can keep making more money.
None of that tells you what return you’ll earn if you buy them at today’s valuation.
The higher the starting price, the more future growth you’re already paying for.
My guess is that the biggest surprise of the next decade won’t be that AI failed.
It’ll be that AI succeeded, tech companies kept growing, and Nasdaq 100 investors still earned much less than they expected.
That’s what high starting valuations can do.
Anyone feels same?
Nasdaq-100 trades around 30x earnings, with S&P 500 CAPE near levels last seen at the dot-com peak. Extreme starting valuations historically compress future 10-year returns, making new long entries unattractive on a risk/reward basis. Avoid chasing QQQ at current levels despite strong AI narratives; price already embeds enormous growth expectations. AI earnings could grow into the valuation; momentum could persist for years; no near-term crash catalyst is identified.
S&P 500 CAPE is approaching 40, historically associated with below-average long-term returns. Broad market valuations suggest lower forward returns, but timing is uncertain, so watching is more appropriate than shorting. Do not assume an imminent collapse, but expect likely subpar long-term returns from current levels. Strong productivity gains from AI could justify higher broad-market multiples.
This Reddit post, published August 21, 2026,
features u/PanicBubbly9353
discussing QQQ, SPY.
2 trade ideas extracted by AI with direction and confidence scoring.