Wall Street Wrap: S&P 500, Nasdaq and Dow Daily — 2026-09-24
Wall Street's record-setting AI rally snapped on Wednesday as Treasury yields surged to their highest levels since 2007, dragging the Dow, S&P 500 and Nasdaq sharply lower. Stocks had climbed to all-time highs earlier in the week — with the Nasdaq posting a string of record closes on strength in AI and chipmakers and falling oil — before hotter-than-expected economic data revived Fed rate-hike fears. Diplomatic optics also weighed, with markets awaiting Trump's meeting with Xi and US–Iran diplomacy.
Wall Street Wrap: S&P 500, Nasdaq and Dow Daily — 2026-09-24
Top developments
10-year Treasury yield surges to 2007-era high, stocks tumble
On Wednesday, September 23, US equities sold off broadly as bond yields surged on inflation worries. The S&P 500 fell 0.74%, the Nasdaq Composite dropped 1.1% — ending its two-day record streak — and the Dow Jones Industrial Average lost 352.10 points, in a session also marked by a rebound in international oil prices. The move matters because higher long yields compress the valuations of the mega-cap growth and tech names that have driven the Nasdaq's record run, and they reinforce expectations that the Fed may deliver additional rate hikes.
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Fed rate-hike concerns put yields back in charge
Investors' renewed anxiety that more Fed hikes could be coming was the stated driver of Wednesday's decline, per CNBC's market coverage, after hotter-than-expected manufacturing data pushed yields to a 19-year high. September's composite PMI reportedly rose to 58.4 — its highest since July 2021 — with firms' input prices accelerating, pressuring both bonds and rate-sensitive tech shares. In Spanish-language financial media, the message was blunt: "Los bonos vuelven a mandar en Wall Street" — bonds are back in charge.
Nasdaq records earlier in the week, powered by AI chips
Before the Wednesday reversal, the Nasdaq Composite jumped 2% on Friday, September 20 to its first record close since June, buoyed by a surge in AI stocks and cooling oil and yields. It extended to fresh record closes on Monday and Tuesday, with Tuesday's close at 27,244.28, up 122.18 points, driven by AI-linked chip stocks; the S&P 500 ended Tuesday within 1% of its August record while the Dow slipped. That whipsaw highlights how concentrated the leadership is in AI/semis — AMD up roughly 36% and Arm up 42% in September per Japanese-market commentary — making the group the primary transmission channel for yield shocks into the indexes.
Oil and diplomacy tug at sentiment
Oil slid for a fifth straight day into Monday's session, helping Wall Street climb "to the edge of its all-time high," before crude rebounded past the US$100 mark midweek and re-ignited inflation concerns alongside the bond-driven selloff. Traders spent the week watching US–Iran developments at the UN, and a Trump–Xi meeting loomed as the next catalyst.
Fund flows stay defensive
US equity funds recorded outflows for a fourth consecutive week in the week to September 18, as rising crude oil prices heightened inflation concerns and expectations of a Federal Reserve rate hike added to investor caution. Persistent outflows even as the Nasdaq set records suggest breadth beneath the headline indexes remains fragile — a setup that amplifies downdays like Wednesday's.
Local view
Spanish-language press framed Wednesday's session around two overhangs: the jump in Treasury yields and crude's return toward US$100, plus investor caution ahead of US meetings with Iran and China on the Middle East conflict and AI policy. Negocios.com reported the five-year Treasury crossing 5% for the first time since 2007 amid another wave of Treasury selling on US economic strength, with the Dow at 51,546 points in intraday coverage. Infobae chronicled the Tuesday Nasdaq record at 27,244.28 before Wednesday's reversal. Japanese media noted the week's tension between rising rates and resilient tech, with the Dow down 185.14 dollars at one session close as higher rates were disliked but tech provided support.
Context & numbers
- Nasdaq Composite record close Tuesday: 27,244.28 (+122.18 points)
- Wednesday, Sept 23: S&P 500 -0.74%, Nasdaq -1.1%, Dow -352.10 points
- Five-year Treasury yield above 5%, first time since 2007; 10-year at highest since 2007
- September composite PMI at 58.4, highest since July 2021, with input prices accelerating
- Oil back above US$100
On the radar
- Trump–Xi meeting (expected the day after Schwab's midweek update) and further US–Iran diplomacy with Iran's president addressing the UN
- Continuing watch on Fed rate-hike expectations as investors digest the hot PMI and 2007-era yields
- Whether US equity fund outflows extend to a fifth straight week after the Sept 18 data
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