BlackRock says AI selloff reshapes oil, Treasury trade in October

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AI selloff reshapes oil, Treasury

Highlights

BlackRock's Jeffrey Rosenberg reports the historical 80% correlation between oil and Treasury yields broke down in October amid a major AI stock selloff.
Market focus shifted as weakness in AI and the Mag 7 stocks became a bigger signal for U.S. economic outlook than rising oil prices, pressuring broader technology shares.
Falling bond yields now reflect concerns that AI weakness implies softer growth and disinflation, while stubborn inflation and oil prices still constrain Federal Reserve policy.

October market break shifts investor focus

As reported by CNBC, BlackRock senior portfolio manager Jeffrey Rosenberg says the long-running correlation between oil and Treasury yields breaks down in October as weakness in major artificial intelligence stocks changes the market narrative.

Rosenberg, who manages the Systematic Alternatives ETF at the asset manager, says oil and Treasuries had shown an unusually high 80% correlation this year. He says that relationship stops mattering in October because investors begin treating the decline in leading AI names, including the so-called Mag 7, as a bigger signal for the U.S. economy than rising oil prices.

He argues that the market now sees AI risk as more important than geopolitical risk. That shift becomes more visible during the Nasdaq selloff, as well as in Google’s historic single-day decline and broader pressure on technology shares tied to the AI buildout.

Bond implications and wider market impact

Rosenberg says falling bond yields reflect a view that weakness in the AI trade points to softer economic growth and a more disinflationary backdrop. He adds that the latest GDP data supports that reading, because AI has become central both to business investment and to the wealth effect that supports consumer spending.

He also points to Microsoft’s return to the public bond market as another sign that the AI trade is now deeply linked to fixed income pricing. In his view, any significant wobble in AI is likely to be treated as a wobble in the broader U.S. growth outlook, which can push investors toward the long end of the Treasury curve even while inflation remains above target.

Rosenberg cautions that this does not mean bonds return to their old role as a straightforward hedge for stocks. Rising oil prices and stubborn inflation still limit the Federal Reserve’s ability to ease policy, but he says October shows that if AI weakness becomes large enough, it can still trigger a meaningful shift toward disinflation expectations and alter how bond markets react.

In our earlier article on the Nasdaq 100’s selloff alongside falling U.S. Treasury yields, we highlighted an unusual market setup in which bond yields declined even after hotter-than-expected inflation data. The piece noted that the index slipped below its 20-day and 50-day moving averages, signaling rising near-term selling pressure, while still holding above the 200-day average that kept the longer-term structure intact. We also flagged key technical levels and the growing sense of investor caution as the typical stock-yield response appeared to be changing.

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