Analyst Michael Kramer warns that a widening gap between single-stock and index-level volatility leaves the S&P 500 exposed to a disorderly unwind. His dispersion index sits at its highest level since 2020, driven by a gamma-squeeze feedback loop in semiconductor stocks.
A hidden imbalance beneath a calm S&P 500 could turn against the market when volatility finally reverses, according to Investing.com contributor Michael Kramer. Even after falling around 0.8% on Monday, the S&P 500 sits roughly where it stood on July 2, yet the options market underneath it is out of balance.
Dispersion at a five-year extreme
Kramer notes that dispersion remains high while implied correlations stay low, leaving single-stock volatility badly out of balance with index-level volatility. The only time his dispersion index has run higher was in 2020, placing it above even the April 2025 tariff tantrum.
The wedge shows up in the options market. The spread between VIXEQ and the VIX remains well above 30, near highs set just days earlier. Of the 142 S&P 500 stocks Kramer tracks, 52% carry implied volatility near their 52-week highs, while none sit near their lows.
A gamma squeeze in the chips
Normally that kind of elevated implied volatility accompanies a falling S&P 500, not a flat one. Kramer reads the divergence as consistent with a gamma-squeeze-like feedback loop rather than genuine fear of individual names. He points to VXSMH sitting at 64 while realized volatility in SMH already runs at 62.4, so the large daily moves in the underlying stocks are themselves pushing implied volatility up.
Semiconductor names appear caught in a gamma squeeze much like Micron was, moving 3% to 4% a day. Because call positioning heavily outweighs put positioning in many of these names, Kramer argues that falling implied volatility may then see the associated delta exposure begin to unwind.
That is the risk he flags. Stocks cannot move 3% to 4% every day forever, and when realized volatility drops it will likely drag implied volatility down with it. If the trade has been driven largely by options-related mania, he cautions, the ending may not be orderly.
Source: Investing.com
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