The Nikkei, the benchmark index of the Tokyo Stock Exchange, fell 5.96% on Friday (Nov. 6) and entered a bear market, according to InfoMoney and other outlets. The drop was triggered by a massive artificial intelligence stock sell-off that dragged down the Nasdaq the previous session. For investors in Brazil, the primary risk is not the Ibovespa, which rose that same day, but rather tech BDRs and ETFs—and what this slump could mean for U.S. interest rates.
Why Did the Nikkei Fall and Enter a Bear Market?
The decline started on Wall Street. On Thursday in New York, the Nasdaq plunged 5.52%, marking its steepest daily drop since April 4, 2025. In Tokyo, the Nikkei fell 5.96% to 57,434.77 points, its worst session since April 2025. The index had rallied sharply on artificial intelligence enthusiasm, and this sell-off served as the final blow.
A "bear market" is the term markets use when an index drops 20% or more from its most recent peak. Sources differ slightly on the exact benchmark. Monitor do Mercado uses the highest closing price, marking a 20.6% drop from the all-time peak of 72,366 points reached on June 25. Meanwhile, Forex.com uses intraday highs, calculating a 21.1% drop from the June record of 72,831.73 points. Under either calculation, the 20% threshold has been crossed.
It may seem contradictory, but the Nikkei remains positive for the year. According to the daily market report, it was still up roughly 14% year-to-date in 2026. This reflects how high the index had climbed beforehand; investors who entered the Japanese market in January are still ahead. The losses belong to those who bought near the peak.
The chart shows the decline was not uniform across Asia, concentrating primarily in markets with heavy exposure to the semiconductor supply chain. In Seoul, the Kospi dropped 6.02% to 5,059.59 points, extending its weekly loss to 12%. During the session, the decline exceeded 8%, triggering the market's 11th circuit breaker of the year. Among individual stocks, SK Hynix fell 10.4% in Seoul, SoftBank Group dropped nearly 11% in Japan, and TSMC lost 4.7% in Taipei. It remains to be seen what drove Wall Street to sell off so aggressively all at once.
What Triggered the Artificial Intelligence Sell-Off?
Market sources point to two simultaneous drivers. First are growing doubts over the return on billions of dollars in data center spending. Second are political factors: Democratic midterm election victories have heightened expectations for stricter regulatory oversight of AI infrastructure investments. Combined, these two factors forced the market to reprice companies valued heavily on future growth expectations.
The scale of the damage in New York helps explain Asia's reaction. According to QuotedData, the sell-off wiped out roughly $2.5 trillion in U.S. market capitalization, with the "Magnificent Seven" alone losing nearly $1 trillion. The Nasdaq 100 fell 6.4%, its largest drop since March 2020. Among chipmakers, AMD tumbled 17.3%, Nvidia dropped 9.3%, and Broadcom lost over 10%.
In other words, the slump did not come out of nowhere. The Nasdaq had been sliding since its October 6 peak, losing about 5.3% in October for its worst month since March 2025. Friday brought some relief, with the Nasdaq gaining 1.09% to 24,579.42 points, but the rebound was not enough to reverse its weekly losses. If global markets were selling off, why did the Brazilian stock market rise?
Why Did the Ibovespa Rise Amid the Panic?
The Ibovespa has minimal exposure to the technology sector, consisting primarily of banks, oil and gas, mining, and utilities. On Friday, the index opened under external pressure, hitting an intraday low of 165,909.74 points before reversing to close up 1.39% at 168,498.45 points. According to InfoMoney, it marked the index's first positive week after three consecutive weekly losses.
This does not mean the Brazilian market is immune. The string of losses the index accumulated following the elections—which we covered in our analysis of the Ibovespa's fifth consecutive decline—stemmed from domestic factors. The tech sell-off has not weighed heavily in Brazil simply because the country has virtually no tech giants. Europe, which has more technology exposure and also reacted to U.S. employment data, declined on the same day, as we explained in our coverage of why European markets pulled back on Friday. The contagion channel of concern is elsewhere: interest rates.
Where Does This Impact the Brazilian Investor's Portfolio?
The first channel is direct: BDRs and ETFs tracking technology or the Nasdaq traded on the B3. These instruments mirror foreign asset performance converted into local currency, and a stronger U.S. dollar helped cushion the blow. On Thursday, according to InfoMoney, the commercial U.S. dollar closed up 0.67%. By our estimate, an Nvidia BDR fell about 8.7% in reais (0.907 × 1.0067 ≈ 0.913), compared to a 9.3% drop in U.S. dollars. In short, the stronger dollar provides a mild cushion, but it does not alter the underlying scale of the problem.
The second channel is indirect and potentially longer-lasting: U.S. interest rates. On Friday, the U.S. Department of Labor reported the creation of 165,000 jobs in October, beating expectations of 65,000, while the unemployment rate ticked down from 4.2% to 4.1%. Capital Economics noted that the data reinforces the likelihood of another Federal Reserve rate hike at its December meeting. The market had already priced in roughly a 70% probability of such a move. Higher U.S. rates attract capital to the dollar and complicate efforts to lower interest rates in Brazil. This impacts fixed-rate bonds, brick-and-mortar real estate funds (FIIs), and leveraged corporate equities.
- The Ibovespa features little technology exposure, meaning the AI stock shock does not directly hit banks, oil, or mining stocks.
- A rising U.S. dollar dampens losses in reais for holders of U.S. tech BDRs and ETFs.
- Investors who entered the Japanese market early in the year remain profitable, even after the bear market.
- Portfolios heavily concentrated in semiconductor and AI BDRs feel the shock almost entirely.
- A Fed rate hike in December would put upward pressure on the dollar and Brazil's yield curve, dragging down fixed-rate assets and FIIs.
- The risk of forced liquidations persists: the Kospi has already faced 11 trading halts in 2026.
Do Japanese Bear Markets Typically Last? Should I Sell Now?
There are no hard rules, but the closest recent precedent serves as a reminder. In August 2024, a 12.4% drop marked the Nikkei 225's worst single day since the 1987 "Black Monday," yet the index recovered its losses within a few weeks. At the time, the catalyst was an abrupt unwinding of a yen-carry trade. This time, however, questions center on the earnings potential of an entire sector, and those types of doubts typically take longer to resolve.
Selling the day after a sharp market drop usually locks in losses at the worst possible moment. The more useful question to ask is: how much of your portfolio is exposed to U.S. and Asian technology? If your exposure exceeds your risk tolerance for a 20% drawdown, the issue is asset allocation, and rebalancing should be done calmly rather than in reaction to a single trading session. Three key figures signal when market conditions are shifting.
The Nikkei relative to the 20% threshold: According to 24/7 Wall St., this level sits near 58,265 points. Closing above it pulls the index out of a bear market, while breaching Friday's intraday low of 56,745 points indicates the sell-off is continuing.
The December Fed meeting: If the probability of a rate hike exceeds 70%, pressure on growth stocks and domestic Brazilian interest rates will intensify. If expectations drop, rate-related pressures will ease.
The Nasdaq relative to its October 6 record: The index sits within correction territory, between 10% and 20% below its peak. Dropping past 20% would pull tech BDRs into the same bear market territory already confirmed in Japan.
