Extreme Volatility Divergence Exposes ‘Fragile Footing’ for S&P

Stock-market risks are everywhere. But you’d be hard pressed to tell anything was wrong by looking at the surface of major US equity gauges.

The S&P 500 Index is about to end the third quarter exactly where it began. The Nasdaq 100 Index, after briefly plunging into a correction, has since shrugged off rising bond yields and risks to the artificial intelligence trade. The Cboe Volatility Index, or VIX, is well below the 20 level that often signals market stress.

Chalk it up to a violent rotation in which rising and falling stocks and sectors are largely balancing each other out, keeping the broader market steady. This gap between index-wide calm and single-stock chaos is nothing new for traders, but lately it’s grown extreme, reaching the widest level since the height of the dot-com crash in 2000, data compiled by Macro Risk Advisors show.

To Dean Curnutt, chief executive of the firm, the possibility of the broader market falling victim to a big macro shock is a risk hiding in plain sight — and one that Wall Street traders aren’t positioning for. A potential selloff in AI hyperscalers and chipmakers could fuel a rout, forcing the whole market to move together as one.

“If a few hyperscalers pull back on AI spending tied to data-center debt concerns as yields rise, that would be awful for the stock market already on fragile footing,” said Curnutt, who is urging clients to use of VIX calls and call spreads for protection against any drawdowns. “You don’t buy flood insurance rooting for your home to flood. You gotta play defense here.”

As the calendar flips to October — historically the most volatile month for US stocks — Wall Street is grappling with a series of risks, from the durability of the artificial-intelligence trade to the threat of higher interest rates amid sticky inflation.

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