Semiconductor Stocks Pressure The S&P 500

Widening credit risk for Nvidia and Broadcom signals caution ahead of high-stakes earnings and the Jackson Hole symposium.

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The S&P 500 finished the day lower, with semiconductor stocks leading the way. The SMH ETF bounced off the put wall today, which had moved down to $545. I just do not know how long that level will hold. There appears to be a decent amount of gamma built up there, and much will depend on how quickly it can be eroded. Tomorrow may give us better insight into that.

But clearly, with the sector in negative gamma, a break of support at $545 could accelerate a downside move toward $500. However, ahead of Nvidia (NVDA), that may be a big task, so a few more days of churning seem possible.

Chart showing SMH net gamma exposure by strike is short gamma overall at -$326.3M, with spot at $548, put wall 545, flip point 562, and call wall 600; largest negative exposure near 548, largest positive near 600

For the most part, the semis are the key to the S&P 500 at this point, and it will be difficult to see the market rally at the index level if the semis are falling. The credit market continues to signal greater risk in the semis, with Broadcom (AVGO) and Nvidia’s CDS widening today. I find it hard to imagine Nvidia and Broadcom’s CDS widening like this while the sector rallies, but stranger things have been known to happen.

Line chart of 5Y CDS mid spreads for NVIDIA and Broadcom, roughly 30-40bps through early 2026, then rising sharply from June 2026, with Broadcom reaching about 127bps and NVIDIA about 87bps by August 24, 2026

Recent data show that Korean inflows have turned to outflows, and the stronger KRW is likely linked to some of that liquidity in semiconductors leaving the U.S. More importantly, the inflow and outflow data are denominated in KRW, so we know the decline wasn’t simply due to the KRW strengthening against the U.S. dollar.

Finally, the VIX1D is very low, below 10, and is unlikely to remain there, given that Nvidia reports Wednesday after the close and Warsh speaks at Jackson Hole on Friday morning. I would expect to see the VIX1D move up toward 20-ish ahead of both events. Whether that increase in implied volatility leads to a market sell-off will depend on whether the VIX rises in tandem.

TradingView chart comparing Cboe 1-Day Volatility Index (8.76, down 12.40%) and VIX (15.86, up 4.76%) from April to September, with RSI indicator below showing values near 45-46, both volatility lines trending lower overall since April peaks above 30

Maybe that is why the VVIX was up a touch today, but more importantly, it has been firm at 86 since the end of May.

Chart of CBOE VIX Volatility Index daily prices from April 2025 to October 2026, with RSI indicator below; VIX at 88.53, up 2.62%, after peaking near 175 and fluctuating between roughly 85 and 140; RSI at 46.38

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