Nasdaq Falls 3.4% for the Week as Friday's Rebound Fails to Offset Weekly Losses
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The Nasdaq lost 3.4% this week, with Thursday's plunge the worst single day since March 2020; Friday's tech-led bounce was narrow and tentative, while mechanical selling pressure and a $7 billion negative-gamma overhang signal the market is far from safe.
How bad was this week?
The Nasdaq ended the week down 3.4%. Friday's 1.1% bounce barely dented the loss.
The S&P 500 fell 2.7% for the week; the Dow dropped 0.9% — all three benchmarks finished in the red.
Thursday was the epicenter: the QQQ ETF — tracking the Nasdaq 100 — plunged 6.5%, the largest single-day drop since the March 2020 Covid crash.
Goldman Sachs' volatility trading desk called it "the most panicked week in a very long time."
How hard did hedge funds get hit?
Goldman's prime-brokerage data shows TMT hedge funds lost over 400 basis points in a single day.
This means → their year-to-date gains collapsed from roughly +24% to near flat — almost an entire year's profit, gone in a week.
In plain terms = the best-performing funds of 2024 gave back nearly everything in five trading sessions.
Friday's bounce — real recovery or mirage?
Friday's rally was driven almost entirely by tech. The ProShares S&P 500 Ex-Technology ETF closed flat — non-tech sectors did not participate.
Vanda Research data shows retail buying in Nasdaq 100 names started modest at the open and faded further through the day.
Nvidia was the most-bought stock at Friday's open — after crashing 9.3% on Thursday, wiping out its full-year gain. Leveraged ETFs SOXL (3× semiconductors) and TQQQ (3× Nasdaq 100) topped the retail buy list.
This reflects a narrow, reflex-driven dip-buy rather than broad-based conviction.
How deep does the "buy the dip" instinct run?
Interactive Brokers chief strategist Steve Sosnick says the buy-the-dip mindset is now "deeply embedded" among active investors.
Many profited from leveraged long products on the way up and refuse to step aside.
His blunt warning: "We now have a generation of investors who run into the building when the smoke alarm goes off."
In plain terms = investors conditioned by years of V-shaped recoveries may be underestimating the structural pressures behind this sell-off.
Mechanical selling — the market's "autopilot" sell orders
This week's decline was not just panic — mechanical selling played a major role.
Volatility-control funds — strategies that automatically cut exposure when volatility spikes — unwound positions at scale over the past week. They make no directional judgment; they simply sell when vol rises.
Dealers hold roughly $7 billion in negative gamma (negative gamma means dealers are forced to sell more as the market falls) per 1% move in the S&P 500 — creating a self-reinforcing selling loop.
This means → the decline itself generates further selling, a spiral that is harder to stop than pure sentiment-driven panic.
What matters next week?
Taiwan's benchmark ETF (EWT) closed below its 200-day moving average for the first time since April 2025 — Asia-Pacific semiconductor sentiment is weakening in tandem.
BofA strategist Michael Hartnett notes the Philadelphia Semiconductor Index (SOX) now sits 17% below its 200-day average; historically, drops of 20%–25% below that line have marked attractive entry points.
Next week brings the October CPI report — a key check on inflation's trajectory.
In plain terms = next week's data will determine whether Friday's bounce was a genuine bottom signal or just a dead-cat bounce — a brief uptick on the way down.
市场有风险，内容仅供研究参考，不构成投资建议。