History in the Making: Nasdaq Hits Record as Stocks Roar Back Despite Fed Hike

MarketBeat’s Sept. 21 video ‘History Is About to Be Made (Stocks Are Roaring Back)’ is not just a headline — it is a thesis placed right after a shaky week. The Dow had just logged its third straight weekly loss, down 1.7% for its worst week since March, the S&P 500 was flat for two weeks, and the Nasdaq managed only a 0.7% weekly gain. Then Monday, Sept. 22 flipped the script: the Dow closed at 52,048 (+0.7%), the S&P 500 at 7,764 (+1.5%), and the Nasdaq at 27,122 (+2.3%) — a 599-point surge that took the Nasdaq past its June 2 record close to a new high. The video frames this as ‘history in the making,’ but one day’s euphoria does not yet make a long-term history.

The rally came in the shadow of the Fed’s Sept. 16 decision — a paradox. The Federal Open Market Committee voted unanimously (12–0) to raise rates by 25 basis points to a 3.75–4.00% range, the first hike since July 2023 and the first move under new Chair Kevin Warsh. The rationale was blunt: inflation remains above target, with August CPI at 3.4% year over year (versus the 2% goal) and the energy component alone up more than 16%. The Fed stressed a ‘timelier return to price stability’ and signaled one more hike before year-end. Think of the Fed like a thermostat: when the economy overheats, it turns down the money tap, credit gets pricier, spending and corporate earnings get squeezed; the 2022–2023 tightening cycle, when the S&P 500 fell more than 20% into a textbook bear market, is the case study.

So why did stocks roar while rates rose? Because two headwinds flipped to tailwinds on the same day. First, bonds: the 10-year Treasury yield had pierced 5.01% on Friday — the first time above 5% in three years — then eased to 4.96%, down four basis points. That yield is the anchor for mortgages, corporate bonds and most loans; even one point moves monthly payments for thousands of households. Second, oil: West Texas Intermediate had peaked near $106 on Sept. 15, then slid 4.8% to $95.50 on Monday, with Brent at $100 — the lowest since Sept. 9 and an 11-day low. Art Hogan of B. Riley Wealth called it a switch ‘from headwinds to tailwinds.’ In the background, geopolitical hopes helped: President Trump told Fox News he would be ‘probably open’ to meeting Iranian President Masoud Pezeshkian at UN General Assembly week, raising hopes of restored traffic through the Strait of Hormuz, while a Trump–Xi summit in Washington and talk of a ‘U.S.–China AI Dialogue’ lifted risk appetite.

The real fuel, however, was AI trade waking up again. The iShares Semiconductor ETF (SOXX) rose nearly 5% and the PHLX semiconductor index jumped 3.7%. Advanced Micro Devices surged 10% to top a $1 trillion market capitalization for the first time — extending a five-day win streak — on expectations that its Instinct accelerators and server CPUs will capture a larger slice of AI demand. Intel jumped 12.1% on reports of joint manufacturing talks with SK Hynix in the United States. Arm Holdings surged 17.2% to its highest close since mid-July. According to Barron’s and Truist, the spark was Meta’s new AI agent Muse hitting No. 1 in Apple’s App Store and being framed as CEO Mark Zuckerberg’s ‘personal superintelligence’ push; Muse prompted Wells Fargo to lift its target and sent Meta shares up 11.4% — its best day since April 9, 2025. The Roundhill Magnificent Seven ETF rose 3.5% and all seven mega-caps finished green; Micron rose about 3% and Samsung advanced 5% in Seoul. To grasp this, think of AI like Mixture-of-Experts (MoE — not the whole brain fires for every question, only the relevant expert, boosting efficiency): AI is no longer a single model but a supply chain from chips to memory (Micron’s HBM demand, reflected in the Memory ETF +3.5%) being priced as one trade.

That AI pulse triggered a broader rotation. Communication services led S&P 500 sectors at +4.3%, information technology at +2.0%, with seven of 11 sectors in the green. Small-cap Russell perked up after weeks of ‘doom and gloom,’ and advancers beat decliners 1.6 to 1 in the S&P 500. Yet breadth was weak: the S&P 500 posted 5 new highs versus 27 new lows, the Nasdaq 51 new highs versus 102 new lows — meaning while the index hit a record, more than half the constituents were still making new lows. That signals deteriorating market breadth, a rally carried by a narrow leadership group, much like a marathon where the lead pack breaks away while the peloton falls behind. Still, erasing the Dow’s 1.7% weekly loss in a single day suggests the intermediate uptrend remains intact.

Another risk barometer, crypto, confirmed the risk-on mood. Bitcoin bounced from overnight lows near $80,600 to about $86,500 — its highest since January — up more than 6%, lifting Robinhood (HOOD), Coinbase (COIN), Strategy (MSTR) and Circle (CRCL) sharply. Gold slipped 1% to $4,385 an ounce, while the dollar index edged 0.2% higher to 100.41. So money rotated out of ‘safe-haven’ gold into ‘risky’ tech and crypto — a classic risk-on day. Whether the rotation sticks will depend on the next CPI print and Fed speakers; a single day’s flow is not a structural trend.

Against the euphoria stands a valuation wall. The Shiller CAPE (cyclically adjusted price-to-earnings — the 10-year average earnings adjusted for inflation) for the S&P 500 sits at 40.5, a step from the dot-com peak record of 44.2 and more than double its long-term average of about 17. As The Motley Fool and The Guardian note, when the dot-com bubble burst the index plunged 49%. LSEG data had the S&P 500 trading at just under 19 times expected earnings on Friday — the lowest multiple since 2023 on the surface, but most of the earnings upgrade comes from AI heavyweights, so the ‘cheapness’ rests on a narrow pillar of optimism. It is like a building that looks solid but the load is concentrated on a few columns — if one cracks, the whole structure wobbles.

On the macro front, the Fed’s ‘higher for longer’ message remains. Futures price a 40% chance the funds rate ends December at 4.25–4.50%, and CME FedWatch shows a 50% chance of another hike next month, with one more signaled before year-end. The market’s sensitivity was on display Sept. 21 when Fed Governor Waller told a breakfast of portfolio managers ‘no cut before the end of 2026; September’s hold at 5.75% carries no implication for November’ — within 40 minutes most morning gains evaporated, leaving the S&P 500 up only 0.2% at 7,652.18 and the Nasdaq flat at 26,534.71 intraday (Eastern Herald). Add looming Treasury bill issuance and ongoing tightening, which could squeeze liquidity further — a risk flagged by Seeking Alpha’s note on the weakening NYSE Advance-Decline line and high-yield bond breadth.

Corporate and geopolitical context fills out the picture. Paramount Skydance’s $110.9 billion (including debt) bid for Warner Bros. Discovery is being negotiated with concessions — a $1.5 billion domestic production investment and sale of some cable channels — to settle antitrust suits from 12 states; WBD jumped 10.8% on the news while PSKY slipped 2.9%. Progress on U.S.–Denmark talks over Greenland sent Greenland Mines tripling and Greenland Energy more than doubling. On the other hand, Anthropic founder Dario Amodei’s call to slow AI development, echoed by Sam Altman and Elon Musk, flags demand risk for suppliers like Nvidia and Micron. And the calendar holds the Nov. 3 midterm elections — political uncertainty that can amplify volatility in an already richly valued market.

So what does ‘history is about to be made’ actually mean? In the near term, the Nasdaq record and AMD’s trillion-dollar threshold are technically historic; but history is written by sustainability. The S&P 500 has delivered a 10.7% compound annual return since 1957, through every bear market; Capital Group notes 10%+ corrections occur roughly every 18 months, 20%+ bear markets every six years — we are four years removed from the last bear. A pullback thus looks ‘almost inevitable’ at these valuations, yet historically buying the panic has paid. My take: this rally may be an AI bubble inflated by a temporary breather in oil and yields; lasting history needs a clear disinflation trend, a clean Fed pause signal, and broad-based earnings growth. Otherwise today’s record becomes tomorrow’s ‘top’ anecdote.

What to do practically? For short-term momentum chasers the AMD/Arm/Meta trio looks tempting, but for valuation-sensitive, long-term investors — especially leveraged or retirement portfolios — caution is wiser: diversify, dollar-cost average, and curb FOMO rather than pile into one sector. Oil and the 10-year yield remain the best leading indicators: when both fall, equities go green; when they reverse, the market flips red just as fast. Until the next data — CPI, Fed speeches, Trump–Xi — arrives, today’s euphoria should be read less as a celebration and more as a warning light.