Rate Anxiety and September Seasonality Put Nasdaq 100's Resilience to the Test
Published on 09/01/2026 at 18:31 | Editorial boerse-global.de
The Nasdaq 100 enters September carrying the weight of history. The technology-heavy benchmark has averaged a 2.1 percent decline during the month between 2017 and 2025, according to calculations by Motley Fool — a seasonal pattern that is now colliding with a freshly hawkish message from the Federal Reserve.
That combination proved toxic on Tuesday, with the index shedding 1.4 percent to settle at 29,051.13 points. The pullback came just one session after the benchmark closed at 29,456.97 points, with futures having pointed to a broadly flat open on Monday as traders braced for the seasonally weak stretch.
Warsh's Jackson Hole remarks reset the rate calculus
The immediate catalyst traces back to Friday, when Fed Chair Kevin Warsh addressed the central bank's annual symposium in Jackson Hole. While acknowledging that this year's inflation readings had beaten expectations, Warsh stressed that the underlying trends did not yet justify a sustained easing cycle.
Bond markets wasted little time repricing. Yields on two-year US Treasuries jumped more than 12 basis points to 4.356 percent, while CME FedWatch data showed the implied probability of a September rate hike surging to 57.5 percent — up sharply from 35.4 percent just a day earlier.
That hawkish repricing effectively erased the optimism that Nvidia had injected into the market just days before. On August 26, the chipmaker delivered quarterly results that beat expectations and guided to 70 percent revenue growth for fiscal 2028 — well above the 44 percent consensus analysts had penciled in. The stock jumped 8.7 percent, lifting the Nasdaq 100 by 1.4 percent alongside software names like Salesforce and CrowdStrike.
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The momentum proved fleeting. The very next session, the S&P 500 slipped 0.25 percent and the Nasdaq Composite lost 0.52 percent, dragged down by semiconductor losses in Nvidia and Intel. Warsh's comments from Jackson Hole thus overrode the chip sector's positive impulse within a single trading day.
A pattern of whipsaw that defined August
The back-and-forth between AI enthusiasm and rate fears has been the defining feature of recent weeks. On August 24, the index fell as investors weighed fresh economic tensions with Iran alongside the upcoming earnings season and another inflation report. Earlier in the month, rising bond yields and disappointing results from Walmart pressured the consumer sector on August 20, while fading hopes for US-Iran rapprochement pushed oil prices and yields higher the following day, reigniting inflation concerns.
Hot inflation data on August 26 had already dampened risk appetite ahead of Nvidia's report, setting the stage for the chipmaker's dramatic reversal of sentiment a day later.
Technical picture: bruised but not broken
Despite the turbulence, the index's longer-term structure remains intact. At 29,051.13 points, the Nasdaq 100 sits roughly 0.3 percent below its 50-day moving average but 6.0 percent above the 200-day average of 27,406.84 points — a spread that suggests the broader uptrend has weathered the recent storm. The relative strength index reads 44.5, pointing to a neutral-to-slightly-softened market rather than an oversold condition.
The distance from peak performance tells a more nuanced story. The index remains 5.6 percent below its 52-week high of 30,762.20 points from June — a level that also marks its all-time record. As of last week, it was still 4 percent off that June peak, making it the last of the major US indices to reclaim its previous high. Yet against its March 31 low for the year, the benchmark still trades 28 percent higher.
The technicals have shifted somewhat from earlier in the month, when the index was hovering 1.1 percent above its 50-day average and 7.5 percent above the 200-day line, with a more comfortable RSI of 52.6. Year-to-date gains stand at 17 percent, with a 26 percent advance over the past twelve months.
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Structural shifts and the road ahead
The index's composition continues to evolve. SK Hynix, the South Korean memory chip maker, joined the Nasdaq in July through what was described as the largest US listing ever by a foreign company, and the stock now counts among the index's members.
For investors, the immediate focus now shifts to the August jobs report, due out this week. That data will serve as the next critical test of whether market expectations for a September rate cut hold up or whether the hawkish repricing triggered by Warsh's remarks gains further traction. One automated screener assessment characterized the current setup as a "mixed" signal for the weeks ahead, capturing the tension between intact momentum and mounting macro uncertainty.
The September curse, it seems, is not merely a matter of calendar — it is amplified by a Fed that appears in no hurry to validate market hopes for easier policy.
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