Nike stock heads into the open after a 4.3 percent slide

Nike stock closed at USD 35.51 on the New York Stock Exchange on September 18, 2026, losing 4.3 percent from the prior session. Per NYSE data compiled by market portals, the shares traded between a session low of USD 35.50 and a high of USD 37.20, with volume clearly above the recent average as investors continued to cut exposure after a prolonged downtrend. Compared with its 52-week high above USD 64 earlier in 2026, the stock has now surrendered close to 45 percent of its value, underperforming the S&P 500, which also slipped modestly at the close on September 18, 2026.

September 18, 2026 in numbers

Nike Inc. (ISIN US6541061031, NYSE: NKE) extended this weak pattern in the last completed session, touching a fresh 52-week low around USD 35.50 before recovering marginally to its USD 35.51 close. Recent coverage by The Street highlighted that Nike’s sharply lower share price has intensified scrutiny of its role in price-weighted indices, underscoring how the multi-month decline has eroded its index influence. A separate valuation-focused article from GuruFocus noted that at around USD 35.51 the shares trade more than 50 percent below its GF Value estimate of USD 72.89, framing the slide as a sharp de-rating amid concerns over earnings momentum and dividend sustainability. Against this backdrop, the S&P 500 ended the same September 18, 2026 session slightly lower, so Nike’s single-session drop significantly overshot the broader market.

Index reshuffle and brand issues today

Today, September 21, 2026, Nike faces additional structural pressure as it is removed from the S&P 100 before the opening bell, ending nearly 18 years in the large-cap index. As El Mundo reports, S&P Dow Jones Indices is rebalancing the S&P 100 to better reflect market capitalization ranges, and Nike’s departure means that index-tracking funds and ETFs tied to the S&P 100 will no longer hold its shares, potentially reducing passive demand. The same report stresses that Nike continues to trade on the New York Stock Exchange under the NKE symbol and remains a constituent of the S&P 500, but analysts warn that the removal could still weigh on sentiment. In parallel, recent commentary from GuruFocus notes that Nike’s Converse brand is managing backlash over a controversial advertisement and reassessing approval processes, adding to the brand and governance questions investors will watch as trading resumes today.