BofA AI Bubble Warning Hits Dot-Com Level: Is Crypto Next in Line?

BofA AI Bubble Warning Hits Dot-Com Level: Can Bitcoin at $84K Hold?

In Crypto News today, the BofA AI bubble warning gained traction on September 27, 2026, after ZeroHedge shared new data from Bank of America strategist Michael Hartnett. 

The AI Big 10 share of US market cap now stands at 41%, matching the 2000 dot-com peak. Bitcoin traded near $84,300 on CoinGecko at last check. 

This crypto news links equity stress to the crypto market.

Is AI Stock Market a Bubble? What BofA Data Shows

Hartnett defines that group as the Magnificent 7 plus Broadcom, AMD and Micron. 

According to ZeroHedge's post on X, this group makes up 41% of US market cap, the level where earlier major bubbles peaked. ZeroHedge also covered this news in that post.

The figures come from BofA Global Research. This market bubble warning rests on AI stocks concentration, not on a price forecast.

AI Stocks Same Level as Dot-Com Bubble: The Numbers

BofA compares three past episodes, each ended by a bond yield surge:

In all three, the end came once rose 2 points or more. Market concentration at 41% is the marker Hartnett highlights today.

What Ends a Stock Market Bubble? BofA Points to Yields

"Quickest way to end US boom is surge in bond yields," BofA writes. That is how bond burst a bubble: higher Treasury lift borrowing costs and can pull money away from risk assets.

Federal Reserve data on FRED shows the 10-year Treasury yield at 5.18% on September 24, 2026, up from 4.96% on September 22 and 5.11% on September 23. 

The BofA comparison puts that about 1.27 points above February, leaving roughly 0.73 points before the 2-point mark. 

Tracking the 10-year Treasury yield and AI stocks together shows whether the link between bond yields and stock market bubble endings is tightening. 

The BofA AI bubble warning rests on exactly that link.

Will AI Bubble Affect Bitcoin and the Crypto Market?

The AI bubble Bitcoin link is indirect. Bitcoin sits outside the AI Big 10, yet it may still react if Treasury yields keep rising and investors trim risk assets. The AI bubble bond yields debate therefore matters beyond stocks.

Bitcoin Price If Stock Market Bubble Bursts: What Could Change?

One metric to watch is the Bitcoin and Nasdaq correlation AI stocks may be shaping, since a tighter link would raise Bitcoin's sensitivity to equity selloffs. The BofA AI bubble warning could matter for crypto if that link strengthens.

Hartnett AI Bubble Warning Explained: What to Watch

Analysts suggest tracking three signals:

• Treasury yields moving toward the 2-point mark

• Any easing in market concentration

• Bitcoin's reaction during equity volatility

The AI bubble warning from Bank of America is a risk flag, not a timing call. The BofA AI bubble warning does not say a crash is certain, and markets could stay stretched for months. 

Yields have already moved quickly this week, so the next few daily FRED readings will matter for both stocks and crypto.

Disclaimer: This article is for information only and is not investment advice. Crypto and stock prices are volatile.