Sandisk Enters S&P 100 as Nike Exits in Major Index Shuffle

Yahoo Finance ·

On Monday, September 21, Sandisk is set to join the prestigious S&P 100 index, featuring 100 major blue-chip corporations. Alongside Sandisk, Dell Technologies, Palo Alto Networks, and Arista Networks will also enter the index, following an announcement made by S&P Dow Jones Indices on September 4. To accommodate these new additions, four major firms will depart from the index: Nike, Colgate-Palmolive, Simon Property Group, and Honeywell Aerospace. This notable transition highlights the contrasting fortunes of 2026. Sandisk shares have surged more than 600% this year, making it the top-performing stock across the entire S&P 500. Conversely, Nike stock recently touched a 52-week low. With a market capitalization of approximately $260 billion, Sandisk is currently more than four times larger than the sportswear icon, which is valued at roughly $54 billion.

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Starting Monday, September 21, Sandisk will be added to the S&P 100 index, while four companies, including Nike and Colgate-Palmolive, will be removed. Sandisk surged over 600% this year to reach a market cap of $260 billion, dwarfing Nike, which stands at around $54 billion. This index reshuffling clearly reflects market trends of outperforming tech stocks and lagging traditional consumer goods. Investors should pay attention to passive capital inflows and changes in fundamental factors for each stock following the index inclusion.

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With Sandisk's inclusion in the S&P 100, mechanical buying from large passive funds is expected to flow in, increasing upward pressure on the stock price in the short term. On the other hand, Nike, which was ejected from the index after hitting a 52-week low, is likely to face continued pressure from institutional investor outflows and deteriorating investment sentiment.

The bullish scenario is that Sandisk continues its growth trend driven by index inclusion effects along with expanding demand for AI and semiconductors, while the bearish scenario is that its excessively high valuation acts as a burden during periods of increased volatility in the semiconductor sector. Key indicators to watch are the scale of passive fund inflows and the earnings of major tech stocks.

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