Michael Novogratz calls AI the biggest bubble of his lifetime but says the rally has not flashed a dramatic break signal. Ray Dalio warns that debt and higher rates could test the market, while all 33 recent NVIDIA analysts rate the stock a Buy.
At the Greenwich Economic Forum in Connecticut on October 7, 2026, Michael Novogratz described AI as the biggest bubble of his lifetime. He still sees room for investors to join the trade.
The founder and CEO of Galaxy Digital said bubbles tend to end in spectacular fashion, and he argued that the market has not reached that point. He also said AI companies' price-to-earnings valuations did not look excessive relative to the industry's potential growth. Novogratz did not name specific multiples or stocks. His remarks were reported by Oninvest.
That is a call on timing, not an assurance that the trade is safe. Novogratz acknowledges that rising long-term borrowing costs cloud the outlook, but he does not think they are enough to end the uptrend. He also points to US political pressure to compete with China in AI, which he believes will make it difficult for Washington to sharply slow investment in the technology.
Ray Dalio sees the financing behind the buildout as a more immediate vulnerability.
Speaking at the Forbes Global CEO Conference in Singapore on October 7, 2026, the Bridgewater Associates founder called the AI market a classic bubble. He warned that substantial borrowing to fund AI investment could become dangerous if interest rates keep rising. Higher debt-servicing costs and reduced liquidity could push investors to sell assets for cash, deepening a market decline. Dalio said the market was nearing the point at which the bubble could burst, as Forbes Japan reported.
Bank of America strategists Arjun Goyal, Riddhi Prasad and Benjamin Bowler flag another risk: narrow market breadth. When a handful of large technology stocks drive much of the market's performance, gains depend heavily on those companies continuing to deliver. The strategists say narrow participation is a classic feature of developing bubbles and has historically tended to persist until a bubble bursts.
Rather than buying technology heavyweights outright, the team favors call spreads tied to an ETF tracking the Nasdaq 100. The options strategy lets investors participate in gains up to a preset ceiling, while limiting their potential loss to the amount paid for the position. The ceiling cuts off further gains, and investors can lose the full premium if the trade fails.
Trying to tell when a rally has run too far is a familiar challenge, as market-cycle timing shows. A valuation warning alone does not identify the turning point. Even a strategy with defined downside can still carry a meaningful risk of loss.
NVIDIA analyst sentiment remains firmly positive despite the debate. TipRanks data show that all 33 Wall Street analysts who issued 12-month price targets in the prior three months rated the stock a Buy. Their average target was about $324.
UBS reaffirmed its Buy rating on October 9 with a $300 target. Bernstein Research maintained an Outperform rating and a $400 target in September. After speaking with NVIDIA Chief Financial Officer Colette Kress, analyst Stacy Rasgon pointed to continued potential in the company's data center business. These are analyst opinions, not guarantees that the stock will reach those prices.
Novogratz has used bubble language before. In November 2017, he called cryptocurrencies the biggest bubble of his life while building a fund to invest in them. The crypto market then suffered a deep downturn in 2018. Galaxy Digital also has direct exposure to the current trend: it is expanding its AI infrastructure business and converting parts of its facilities from Bitcoin mining to provide computing capacity for AI applications.
Two indicators underpin the competing calls: whether technology companies stick to their planned AI infrastructure spending, and whether borrowing costs continue to rise. Higher financing costs make large projects more expensive and can pressure valuations, but neither factor alone tells investors when a correction will arrive.
Call spreads reshape that risk rather than remove it. The maximum gain is capped, and investors can lose the premium they pay. They also need to understand the option's expiration and the fund exposure before using the strategy. The trade-off depends on each investor's goals and time horizon; tolerance for loss matters too.
NVIDIA is expected to report third-quarter fiscal 2027 results on November 25, 2026. Bond yields remain a key measure for assessing Dalio's concern about debt-financed investment and rising financing costs.
