On Thursday, November 12, 2026, two of the world's most valuable companies had a crisis on the same day, for unrelated reasons. Jensen Huang resigned as Nvidia's CEO after reports of extramarital affairs, including one with a woman U.S. intelligence suspects of spying for China. The board named finance chief Colette Kress interim CEO, as Digital Influence reported. The same day, a Microsoft 365 outage disrupted Outlook, Teams and AI connectors, and it was still unresolved into Friday.
Microsoft's problem is operational dependency: when one vendor's software fails, the email, collaboration and AI assistants built on it fail together.
A governance shock at the AI chip supplier
The size of Nvidia's slide depends on who is counting and from when. CNBC reported the stock is down 29%, about $1.6 trillion, since early October and headed for a sixth straight weekly loss, its longest losing streak since 2012. ITdaily put the decline at about 37% since the revelations began, with shares opening near $150, down from $228 a month earlier. CNBC co-host Carl Quintanilla told Adweek that shareholders had lost nearly $2 trillion.
The selling began before the Huang news. CNBC reported the stock fell about 9% the prior week, much of it after midterm ballot measures that could slow the AI buildout, and earlier on worries that rising interest rates would hurt debt-reliant customers such as neoclouds. A TechCrunch opinion column on the risks Huang's exit poses to the AI industry pointed to the financing underneath that buildout. Citing Forbes, it said nearly half of roughly $80 billion in data center bonds issued this year were rated junk, and it noted that in August Huang announced up to $500 billion in build-out commitments from investment firms, with Nvidia guaranteeing the GPUs would retain value as collateral.
Nvidia is signaling continuity. In its November 12 filing with the SEC, board chair Harvey C. Jones said "we expect the company's operations, customer commitments and product roadmap to continue without interruption." Kress keeps her CFO role while serving as interim CEO. Several analysts quoted by CNBC said the business is intact even as at least six downgraded the stock, and Quintanilla said most of Nvidia's 2027 business is already booked.
The less settled risk sits in Washington. According to the Council on Foreign Relations, citing The New York Times, the Justice Department took over a Commerce Department probe into whether Megaspeed, the Singapore company run by Alice Huang, helped Chinese firms get around export controls. CFR says Megaspeed reportedly bought more than $4.8 billion of Nvidia chips. CNBC reported that the investigations could bring sanctions that hurt Nvidia's international business. The board said it "has no reason to believe that either national security or Nvidia secrets were compromised," per CNBC, and none of the reporting reviewed here describes sanctions or charges against Nvidia itself.
The next real data point is Tuesday, November 17, when Nvidia reports results after the market closes. Nvidia guided to about $108 billion in revenue, plus or minus 2%, according to Crypto Briefing, and that guidance excludes data center revenue from mainland China and Hong Kong, TokenPost reported. LSEG's consensus is $108.9 billion. Axios called the call Kress's first test.
An operational failure in everyday software
Microsoft's outage reached commerce teams faster. Downdetector logged more than 130,000 Outlook reports from 74 countries on Thursday evening, ITdaily reported, and Marketing4eCommerce México noted those counts are user reports, not necessarily affected individuals. The outlets disagree on timing: CNBC said problems began shortly before 1 p.m. ET, while ITdaily put the start at 5:17 p.m. Belgian time. The outage also reached Defender XDR, Cybersecurity News reported.
Microsoft described a loss of capacity rather than a traffic surge: a process that sets up secure connections on affected servers becomes overwhelmed, and the servers stop handling requests, according to LazyAdmin. Microsoft is rolling back a network change that "coincides with the start of the impact," but as of November 13 it had not published a root cause, CIO&Leader reported. Executive Vice President Charles Lamanna said there is "no indication" of a cyberattack.
The AI layer failed with it. Anthropic and OpenAI said their Microsoft 365 connectors for Claude and ChatGPT stopped working, though the assistants themselves kept running. CNBC reported Richemont's earnings were slightly delayed and Air India rerouted customer emails. Microsoft is extending delivery retries for delayed email for up to 48 hours.
On compensation, secondary guides such as Office Watch and LazyAdmin say Microsoft's service level agreement promises 99.9% monthly uptime per service and that credits must be claimed, not paid automatically. LazyAdmin gives a December 31, 2026 deadline, while PPC Land describes a one-month window. Teams should confirm against Microsoft's own terms.
What is known and what is not
This week's events do not measure concentration on their own. The reporting reviewed here does not include sourced market shares for AI chips, cloud or business email, so the size of the dependence is not quantified in this piece. What the week does show is that the two risks travel differently. Nvidia's reaches commerce more slowly: Quintanilla said most of Nvidia's 2027 business is already booked, and the board chair expects customer commitments to continue without interruption. Microsoft's reached customer email and AI workflows within hours, with the cause still unconfirmed.