2026-11-08

Nasdaq Fell 3.4% for the Week, But Micron Jumped Double Digits in a Day - How to Tell a Dead-Cat Bounce From a Real Bottom

Written & reviewed by the TradeSmrt editorial team · 2026-11-08

In this article

What Happened
The Test That Separates a Real Bottom From a Bounce
What to Take Away From This
FAQ
Sources

What Happened

The trading week that closed on Friday, November 6 told two completely different stories depending on which day you looked at. The center of it all was Thursday, November 5's historic rout: the Dow Jones Industrial Average plunged 1,833.06 points (3.44%), the S&P 500 fell 4.36% to close at 7,353.73, and the Nasdaq Composite collapsed 5.52%. It was the worst single-day decline since the April 2025 tariff shock, and it pushed the Nasdaq more than 10% below the all-time high it had set just a month earlier, officially putting the index in correction territory. All eleven S&P 500 sectors fell that day, but stocks most tied to AI data center spending took the biggest hits by far.

Then, just one day later, the mood flipped. Bargain hunters piled back into the very chip names that had been hit hardest on Thursday: Nvidia rose 5.6%, while AMD, Intel and Micron climbed anywhere from roughly 3% to over 10%. At the closing bell, the S&P 500 finished up 0.31% at 7,376.86 and the Nasdaq Composite gained 1.09% to close at 24,579.42. The Dow, however, moved in the opposite direction yet again, slipping 237.33 points (0.46%) to 51,285.73 - keeping the week's pattern of index-level disagreement alive right up to the closing bell. That morning's October jobs report, which showed payrolls jumping by 165,000 (more than double the roughly 59,000-65,000 economists expected), fed two contradictory reactions at once: relief that Thursday's panic had been overdone, and renewed worry that a red-hot labor market gives the Fed more room to keep hiking rates.

Add the whole week together, and the Nasdaq Composite finished down roughly 3.4% while the S&P 500 closed the week down about 2.7%. The single-day crash and the single-day bounce largely offset each other in the headlines, but the net result is unambiguous: this was a losing week, full stop. That single fact set off an immediate debate on Wall Street over whether Friday's chip rally was proof the selloff was over, or just a temporary pushback inside a still-intact downtrend.

The Test That Separates a Real Bottom From a Bounce

Answering that question starts with looking at why chip stocks rebounded on Friday in the first place - and why they didn't all rebound by the same amount. Thursday's selloff had a clear trigger: fears that "AI data center regulation" was coming, fueled by Democrats retaking both chambers of Congress in the November 4 midterms and a wave of local backlash over data center construction and rising electricity bills. That political and regulatory uncertainty threatened the entire investment thesis behind AI infrastructure spending, and it hit the whole AI value chain at once. But look closely at Friday's bounce, and the "quality" of the rebound varied stock by stock. Micron, which rallied close to double digits, has a standalone fundamental story - a memory-chip supply shortage - that has little to do with AI regulation risk. Nvidia's smaller 5.6% gain, by contrast, reflects the fact that it sits closest to the exact uncertainty that triggered the crash: the overall AI data center capex cycle. In other words, Friday's rally looks less like "AI fears are resolved" and more like selective bargain-hunting in the names that had been sold off the hardest in Thursday's panic.

This is exactly where a decades-old piece of Wall Street technical analysis becomes useful: the "follow-through day," a concept systematized by legendary investor William O'Neil. The rule is straightforward. After a sharp selloff, the first up day is labeled "day one" of a rally attempt. Only when at least four trading days have passed from that point - and the index then posts a gain in the mid-single-digit percent range or higher (roughly 1.5%+) on volume higher than the prior session - can you call the downtrend confirmed over and a new uptrend underway. A big bounce on days one through three of a rally attempt doesn't count; it's treated as unconfirmed. The logic behind the waiting period is simple: a panic-driven crash can produce a sharp bounce purely from short covering and short-term dip-buying, with no real change in the underlying trend. Whether that bounce turns into something durable depends on whether buying continues over several sessions and whether the index avoids breaking back below the rally attempt's starting low.

Apply that framework to November 6, and Friday's rally counts only as "day one" of a potential rally attempt - the earliest, least-confirmed stage by definition. At least four more trading days need to pass before the follow-through test can even be applied. Add to that the fact that the Dow moved in the opposite direction on the very same day, and that the Nasdaq still finished the week down 3.4% overall, and the picture looks less like a confirmed turn and more like a market that hasn't yet settled on a single direction. History offers a caution here too: single-day bounces that fail and give way to fresh lows are common after sharp selloffs. Even the April 2025 tariff shock saw choppy, back-and-forth trading for several sessions before a genuine trend change was confirmed.

What to Take Away From This

The first lesson is to separate "a one-day bounce" from "a trend reversal." It's a normal technical reaction for the stocks that fell hardest the day before to rebound hardest the next day - that alone is not evidence the crisis has passed. What matters more than the size of a single day's rebound is whether the rally continues over multiple sessions, backed by rising volume.

The second lesson is that rebounds within the same sector aren't all created equal. Micron's bounce came from an idiosyncratic fundamental story (memory supply tightness), while Nvidia's comparatively muted gain suggests lingering doubt about the broader AI spending outlook. An investor who asks "why did some chip stocks rebound more than others" will make sharper calls than one who just reacts to a headline that says "chip stocks rallied."

The third lesson is that persistent disagreement between indexes is itself information. A pattern where the Nasdaq and S&P rise while the Dow falls on the same day signals that growth/tech stocks and traditional industrial/financial names are pricing the same news in fundamentally different ways. In moments like this, resisting the urge to go "all in" or "all out" - and instead waiting for a structured confirmation signal like a follow-through day - tends to limit costly mistakes.

FAQ

What exactly does a "follow-through day" confirm?

A follow-through day is a technical signal used to verify, with price and volume data, whether a market has genuinely bottomed and shifted into an uptrend after a sharp decline. It requires the index to post a gain of roughly 1.5% or more on volume higher than the prior session, occurring no earlier than the fourth trading day after the first up day of a rally attempt. Rallies on days one through three are treated as unconfirmed.

Chip stocks bounced hard on Friday - why stay cautious?

Because the bounce more likely reflects a technical reaction to Thursday's oversold conditions than a genuine resolution of the regulatory fears that triggered the selloff. Notably, Nvidia - the stock most directly tied to AI data center spending - posted the smallest gain among the group, while the Dow fell on the very same day. That lack of agreement across indexes suggests it's too early to call this a confirmed trend change.

Why did Micron's rebound outpace Nvidia's by such a wide margin?

The two stocks face different types of risk. Micron's price is driven largely by its own supply-and-demand story in memory chips (DRAM and NAND), which is largely separate from AI regulation concerns. Nvidia, on the other hand, is directly tied to the overall AI data center investment cycle - the very thing the selloff was about. Since the crash originated in political and policy uncertainty around AI infrastructure spending, it makes sense that the stock closest to that uncertainty saw a more limited bounce.

Sources

This article is an independent synthesis and analysis based on the reporting below, not a reproduction of the original coverage. Please check the original sources for the latest figures.

⚠️ This article is for informational purposes only and is not investment advice. Market conditions change constantly, so always verify the latest data before making investment decisions.