VOO Dives 0.6% Amid Tech Stock Slump: NVIDIA Leads Decline

The Vanguard S&P 500 ETF (VOO) declined by 0.6% in trading on August 18, 2026. The fall was largely attributed to five technology stocks: NVIDIA Corporation (NVDA), Micron Technology, Inc. (MU), Broadcom Inc. (AVGO), Meta Platforms, Inc. (META), and Intel Corporation (INTC). These stocks combined accounted for approximately 78% of the decline.

UnitedHealth Group Incorporated (UNH) had a negligible impact on the index, as its movements were mostly unchanged. With a weighting of only 0.51% in the S&P 500 index, even a significant drop would have little effect on VOO's performance.

The five technology stocks responsible for the bulk of the loss were substantial contributors to the decline. NVIDIA led with a -2.28% intraday return and an estimated impact of -0.174 percentage points on the index. Micron Technology followed closely with a -7.71% return and an estimated contribution of -0.116 percentage points.

VOO remains a popular choice for investors seeking low-cost access to the S&P 500. With an expense ratio of 0.03%, the fund boasts total net assets of $979 billion. UnitedHealth continues to be significant, with revenue reaching $112.0 billion in the second quarter and adjusted earnings per share coming in at $6.38.