Siebert Financial flags S&P 500 concentration risk as NVIDIA selloff exposes index vulnerability
SPY•Siebert Financial said concentration leaves S&P 500 investors exposed to company-specific risks. The largest S&P 500 ETF’s top 10 holdings made up about 37.6% of assets, while NVIDIA’s 4.27% decline on Monday was estimated to drag the index by 0.30 percentage points.
1. Index concentration risk
Siebert Financial said heavy concentration in the S&P 500 exposes index investors to company-specific risks despite the index’s broad holdings. The largest S&P 500 ETF’s top 10 holdings represented roughly 37.6% of assets, and its technology exposure was about 36%.
2. NVIDIA’s index impact
NVIDIA’s 4.27% decline on Monday imposed an estimated 0.30-percentage-point drag on the S&P 500, reflecting its roughly 7% weighting. The selloff followed an independent investigation into reports that CEO Jensen Huang was targeted by a foreign intelligence effort. NVIDIA’s November 17 earnings were another company-specific event with significant implications for index investors.
