Tip: Try a valid symbol or a specific company name for relevant results Sandisk Joins the S&P 100 on Monday -- the Same Day Nike Leaves It The above button links to Coinbase. Yahoo Finance is not a broker-dealer or investment adviser and does not offer securities or cryptocurrencies for sale or facilitate trading. Coinbase pays us for certain activity generated through this link.
Prices displayed are informational. On Monday, Sept. 21, **Sandisk** (NASDAQ:SNDK) takes a spot in the S&P 100, a subset of the **S&P 500** (SNPINDEX:^GSPC) made up of 100 of its largest blue-chip companies. **Dell Technologies**, **Palo Alto Networks**, and **Arista Networks** enter with it. The announcement came from S&P Dow Jones Indices on Sept. 4, and the changes take effect before Monday's open.
Four companies are leaving to make room: **Nike** (NYSE:NKE), **Colgate-Palmolive**, **Simon Property Group**, and **Honeywell Aerospace**. **_Missed Nvidia in 2009? This Rare Signal Is Flashing Again._**_In 2009, a "Double Down" signal flashed for a little-known chipmaker called Nvidia. For the first time in years, that same "Total Conviction" signal is flashing for a company 1/100th the size of Nvidia._**_Continue »_** The swap says a lot about how 2026 has gone.
Sandisk shares have gained more than 600% this year, more than any other stock in the S&P 500. Nike's stock, meanwhile, reached a 52-week low this week. And Sandisk, worth about $260 billion, is currently more than four times the size of the roughly $54 billion sportswear giant.
Still, an index milestone and an investment case are two different things. Here's what Monday's change does for Sandisk's stock -- and what it doesn't. When a stock enters an index, the funds tracking that index have to buy it.
After all, that mechanical demand is the reason index additions attract investors' attention in the first place. But Sandisk's pool of forced buyers is smaller than it might seem. The company already belongs to the S&P 500, so the giant funds tracking that benchmark own the stock.
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