Foreign spy attacks on US tech companies: what happened to stocks each time

On November 8, 2026, Nvidia's board announced an independent investigation into CEO Jensen Huang following reports that he had been targeted by foreign intelligence. Nvidia — the world's largest company by market cap — fell 4–5% on the day. The Megaspeed chip diversion story (a Malaysian affiliate allegedly routing $4.8B in Nvidia chips to Chinese entities) had already been part of the November 5 "tech wreck" that sent the Nasdaq down 5.5%.

For Indian investors holding NVDA through Vested, INDmoney, or Rovia, the question is immediate: Is this serious? Should I sell? Has this happened before?

It has happened before. Eight times in the past four years, to be precise. Here is what the data says.

The 8 cases: master table

Deep dive: each case

1. Nvidia CEO investigation (November 2026)

The board probe is not a criminal charge. The investigation relates to allegations that Jensen Huang was targeted by foreign intelligence — specifically linked to Megaspeed, a Malaysian affiliate in Singapore that allegedly sold $4.8B in Nvidia chips to Chinese entities circumventing US export controls. The Commerce Department referred the matter to the Justice Department.

Jensen Huang remains CEO. The board stated there is no evidence he personally acted wrongfully or that any secrets were compromised.

What this is: A CEO personally under a board-initiated investigation — not charged, not suspended. The 4–5% drop prices in uncertainty about leadership continuity and potential regulatory escalation, not guilt.

The unique risk here: Nvidia has no known succession plan. Most S&P 500 companies have an identified internal successor; Nvidia's identity is tightly bound to Huang's vision. That succession premium explains why the probe hits harder than it might at other companies.

2. Super Micro (March 2026)

This is the worst-case scenario — and the one to understand clearly so you don't confuse it with the Nvidia probe.

Super Micro co-founder Yih-Shyan "Wally" Liaw was criminally indicted for allegedly diverting $2.5 billion in Nvidia AI servers to China via Southeast Asian intermediaries — a direct violation of US export controls. This is not an investigation. It is a federal criminal charge.

The stock fell 26–33% in a single day. That is rational: criminal charges against a co-founder on this scale represent existential legal and reputational risk to the company. Super Micro said it was cooperating.

The lesson: Investigation ≠ indictment. The Nvidia CEO probe is at the investigation stage. Super Micro's crash happened at the indictment stage — a materially different legal event.

3. Nvidia H20 export license (April 2025)

The H20 was the last Nvidia chip China could legally buy — specifically designed to comply with earlier export restrictions. When the Commerce Department required a license to export even the H20, Nvidia disclosed a $5.5 billion revenue charge in a single quarter. This was real, quantified money leaving.

Stock fell 10% on the news. Recovery came over weeks as investors recalculated: the data center AI buildout in the US, Europe, and Southeast Asia was growing faster than the China revenue being lost.

The lesson: When export restrictions translate directly to a disclosed dollar charge, the drop is proportional to the charge size. $5.5B on a company Nvidia's scale = 10% hit. Numbers beat narrative.

4. Applied Materials DOJ probe (November 2023)

Applied Materials — the world's largest semiconductor equipment maker — was reported to be under DOJ criminal investigation for allegedly shipping chip equipment to China's SMIC through a South Korean subsidiary, circumventing export controls.

The stock fell 5–7% on the day. AMAT had also reported an earnings beat on the same day — the probe headline overwhelmed it.

By August 2024, AMAT disclosed it had received a DOJ subpoena and was cooperating. No charges had been filed.

The lesson: A probe with no charges = 5–7% hit that recovers over weeks. The overhang remains until resolution, but it doesn't prevent the company from operating.

5. Nvidia H800/A800 loophole closed (October 2023)

Nvidia had designed the H800 and A800 specifically to comply with the first round of export restrictions (which banned the H100 and A100). The Biden administration closed this loophole in October 2023 — the third export restriction on Nvidia in just over a year.

Stock fell approximately 3% on the news. Market reaction was muted relative to 2022.

Why so little? By October 2023, the AI data center demand story was so overwhelming that investors had de-rated China revenue in their models. Losing China access again barely moved the needle compared to the US/hyperscaler demand wave.

Nvidia stock went on to triple in the following 12 months.

6. Micron China ban (May 2023)

China's Cyberspace Administration announced that products from Micron Technology (the US memory chip maker) had "failed" its security review and banned critical infrastructure operators in China from buying Micron chips.

NVDA fell 3–6% premarket; settled about 3% down on the day. The stock gained 11.6% in the following week.

Why the fast recovery? The ban was narrow — critical infrastructure operators only, not consumer or standard enterprise. Micron's management said the impact was "very little" in the near term. The "national security" framing was widely seen as retaliatory (the ban came days after the US restricted Micron's Chinese rivals from buying certain US equipment).

7. Nvidia first export ban (August–September 2022)

The original US ban on exporting Nvidia's most advanced chips (H100, A100) to China and Russia was announced in August 2022. Nvidia fell approximately 11% on the news and disclosed $400 million in at-risk quarterly China revenue.

This was the largest single-day spy/export drop in this list (excluding criminal indictments). Why? This was the first ban — maximum uncertainty. No one knew how significant Chinese AI demand was going to be, so the market priced in the revenue loss without a compensating demand story.

By 2024, it was clear that US hyperscaler demand more than compensated. The H100 became the most valuable semiconductor product in history.

8. Qualcomm $975M China fine (February 2015)

The counter-intuitive case. China's National Development and Reform Commission fined Qualcomm $975 million for antitrust violations. The stock rose 1–3% on the settlement announcement.

Qualcomm had been under investigation for over a year. The uncertainty had been priced in. The settlement gave investors certainty — they knew the worst. Resolution of an investigation is almost always better for the stock than the investigation itself.

The lesson is structural: Ongoing investigations are priced at probability-weighted worst cases. Settlements remove the probability weighting and replace it with a known number.

The severity scale

What determines how bad the stock drop is:

The pattern is clear: legal proximity and certainty determine severity. An outsider spy = noise. A company probe = moderate, temporary hit. A criminal indictment = severe and prolonged. A settlement = relief.

12-month returns after each event

In 5 of the 7 resolved cases, the stock was meaningfully higher 12 months after the event. The two exceptions: Super Micro (criminal indictment, unresolved) and the current Nvidia probe (pending).

What this means for Jensen Huang and NVDA now

Huang is in the 4–8% drop category — CEO under board probe, not charged. That is consistent with the 4–5% fall on November 8.

Three things are specific to Nvidia that make this probe more significant than a standard company-under-investigation case:

1. No known succession plan. Most S&P 500 companies have identified internal candidates for CEO succession. Nvidia's identity, culture, and strategic direction are tightly tied to Jensen Huang. If he were to step down, the company would face months of uncertainty that most companies do not.

2. Q3 FY27 earnings on November 18. This is the more important event. If Nvidia's data center AI revenue remains strong, the investigation becomes a footnote. If earnings disappoint, the probe amplifies the sell-off.

3. Export controls are the structural risk. The spy probe is a headline risk. The H20 restriction ($5.5B charge), the ongoing Commerce Department oversight of AI chip exports, and the possibility of further restrictions on Nvidia's China-designed chips — these are the fundamental risks that determine NVDA's long-term value. The probe is noise relative to this.

Separate the probe from the export controls. They are two different risks with two different timelines.

Practical guidance for Indian NVDA holders

If you hold NVDA via Vested, INDmoney, or Rovia:

• No immediate action is required based on the probe alone
• Watch November 18 (Q3 FY27 earnings) — that is the real reset
• If your NVDA position is in a loss, the probe-driven dip is a valid tax-loss harvesting moment: sell, record the loss for Schedule 112A, buy back after (India has no wash-sale rule equivalent at the Indian tax level, though your US broker settles based on US rules)
• If you're considering buying the dip: wait for November 18 earnings before committing significant capital

If you hold SMCI (Super Micro):

• This is a materially different situation — criminal indictment of a co-founder
• The recovery timeline is months, not weeks, and depends on legal resolution
• Risk/reward is asymmetric downward until charges are resolved

The broader lesson for Indian US-stock investors

Foreign espionage and export control headlines are going to increase over the next decade. The US-China technology decoupling is structural, not cyclical. Nvidia, AMD, Applied Materials, ASML, Lam Research, KLA Corp — every major semiconductor company is in this geopolitical crossfire.

The Indian investor who panics and sells on every export control headline would have sold Nvidia after each of the three bans between 2022 and 2025 — missing a 10x move.

The right framework: assess whether the event creates a permanent revenue loss (H20 ban = yes, $5.5B/quarter gone) or a headline risk with no immediate revenue impact (CEO probe = latter). Act on the former, monitor the latter.

FAQ

Should I sell my NVDA because of the Jensen Huang probe? Not based on the probe alone. The historical pattern for CEO-under-investigation (not charged) is a 4–8% hit that recovers as the earnings story reasserts itself. Watch November 18 earnings first.

What is the difference between the Nvidia probe and the Super Micro indictment? Investigation vs. criminal indictment. The Jensen Huang situation is an independent board probe — no charges, no arrests, no DOJ action against Nvidia. Super Micro's co-founder was federally indicted. That is a materially more severe legal event.

How do export bans affect my Indian tax position on NVDA? Export bans affect NVDA's stock price, not your Indian tax position directly. Your capital gains are still computed in INR (buy price × buy-date USD/INR vs sell price × sell-date USD/INR). The ban doesn't create a taxable event for you.

Is Nvidia's stock price affected more by the probe or by export controls? Export controls are the structural risk; they affect real revenue. The probe is a leadership/governance risk. Historically, revenue impacts (export bans with disclosed charges) move the stock more than probe headlines.

Which Indian LRS platform should I use to buy or sell NVDA? Rovia (0.15% brokerage, cap $15) is cheapest for trades above ~$10,000. Vested Basic (0.25%, cap $35) or INDmoney (0.25%, cap $25) are fine for smaller positions. All three give access to NVDA.

Sources

Figures last checked November 2026. Verify before investing — legal situations change.

1. Nvidia board investigation statement (November 8, 2026) — Nvidia investor relations, ir.nvidia.com (Nov 2026)
2. Super Micro co-founder indictment (March 2026) — US Department of Justice press release, justice.gov (Nov 2026)
3. Applied Materials DOJ probe (November 2023) — Bloomberg, via SEC 8-K filing, sec.gov (Nov 2026)
4. Micron China ban (May 2023) — Cyberspace Administration of China announcement; Micron 8-K filing (Nov 2026)
5. Nvidia H20 export restriction and $5.5B charge (April 2025) — Nvidia SEC 8-K, sec.gov (Nov 2026)
6. Nvidia H100/A100 first export ban (August 2022) — US Commerce Department Bureau of Industry and Security, bis.gov (Nov 2026)
7. Qualcomm China NDRC fine settlement (February 2015) — Qualcomm press release, qualcomm.com (Nov 2026)
8. RBI LRS guidelines — rbi.org.in (Nov 2026)
9. Income Tax Act Section 112A (LTCG) and 111A (STCG) — incometax.gov.in (Nov 2026)

Vested.blog is the editorial publication of Rovia.