Nikkei Falls as Ex-Dividend Drag and Higher Yields Weigh on Tokyo

The broader TOPIX fell 70.87 points to 4,041.13, showing a wider decline across the market. About 85% of Prime Market stocks fell, while only 11% rose, highlighting the broad pressure that followed the previous day’s failed attempt by the Nikkei to stay above 67,000.

The Nikkei opened at 65,558, slightly higher than the previous close, but quickly lost momentum. It reached an early high of 65,805, then came under selling pressure as investors adjusted positions after the September-end dividend rights date.

The index later fell as low as 64,699 in afternoon trading, briefly dropping below 65,000, before recovering part of the loss into the close. The final decline of 396 points was smaller than the intraday fall, helped by late index-linked buying and renewed support for selected semiconductor-related shares.

The September 29 session followed the final rights-carrying day for many companies with September 30 record dates. The ex-dividend adjustment mechanically reduced the value of dividend-paying shares, creating a large drag on the indexes.

Market estimates put the ex-dividend impact on the Nikkei at around 380 points. That means that while the headline index fell nearly 400 points, the underlying move was closer to a small decline after adjusting for dividends.

The ex-dividend effect also weighed heavily on TOPIX because the broader index includes many dividend-paying financial, industrial and value shares. That helped explain why TOPIX fell more sharply than the Nikkei in percentage terms.

Prime Market trading remained active, with volume of 2.44155 billion shares and trading value of 7.3224 trillion yen. The elevated turnover reflected dividend-related adjustments, index flows and repositioning after the Nikkei’s sharp swings over the past several sessions.

Nikkei CNBC-style market commentary would likely focus on the contrast between the headline fall and the adjusted picture. The market looked weak because of the ex-dividend drop, but late buying in futures and semiconductor shares helped prevent a deeper close.

The day’s intraday pattern was important. The Nikkei briefly fell more than 1,100 points from the previous close during afternoon trading, but buying appeared after the index broke below 65,000. That echoed recent sessions in which declines have drawn futures-led buying near key technical levels.

The late recovery suggested that some investors still see value in buying dips, especially in index-heavy semiconductor and artificial intelligence-related shares. However, the broad market remained weak, and the high proportion of declining stocks showed that confidence was limited.

U.S. market weakness added to the pressure. The Dow Jones Industrial Average fell in the previous session as uncertainty over U.S.-Iran negotiations and higher long-term interest rates weighed on sentiment. That gave Tokyo a weaker overseas lead.

Rising global bond yields remained a major concern. Higher U.S. and Japanese yields make equities less attractive, especially high-valuation growth shares, by increasing the discount rate applied to future earnings.

The 10-year Japanese government bond yield was around 3.085%, staying near levels not seen for decades. That continues to reshape the investment environment for banks, insurers, growth shares, mortgages, corporate borrowers and public finances.

Higher yields can support banks and insurers by improving lending margins and investment returns, but they also raise borrowing costs and increase the government’s debt-servicing burden. For equity investors, the balance between those effects remains uncertain.

On September 29, financial shares did not provide the same support they had shown before the dividend deadline. The ex-dividend adjustment weighed on many high-dividend banks and insurers, while broader market caution kept investors from aggressively buying rate-sensitive value shares.

The Bank of Japan’s September 18 rate hike remains central to the market. The BOJ raised its policy rate to 1.25%, the highest level in 31 years, but the yen has remained weak because investors judged the decision as less hawkish than expected.

The dollar traded at 157.37 to 157.38 yen at 5 p.m., slightly weaker for the yen than the previous day. The currency remained near levels that continue to support exporters but also raise concern about imported inflation.

A weak yen helps automakers, machinery makers, electronics companies and precision-equipment manufacturers by increasing the yen value of overseas earnings. It also supports parts of the Nikkei because many large-cap exporters and technology companies earn significant revenue abroad.

However, yen weakness raises costs for energy, food, raw materials and consumer goods. That remains a burden for households, retailers, importers and companies with limited pricing power.

Japanese authorities remain focused on currency stability. The yen’s failure to strengthen decisively after the BOJ’s rate hike has kept intervention risk in the background, especially if the currency weakens quickly toward 160.

Oil also weighed on sentiment. Concerns over the Middle East and the U.S.-Iran conflict kept energy prices elevated, supporting inflation fears. In Tokyo commodity trading, Dubai crude futures rebounded, reflecting continuing concern over energy supplies.

For Japan, higher oil is a direct economic burden because the country imports most of its energy. Crude prices feed into gasoline, electricity, aviation fuel, shipping, logistics, chemicals and manufacturing.

The combination of high oil and a weak yen is especially difficult. Even if crude prices are lower than recent peaks, yen weakness can keep import costs high for Japanese households and companies.

Households remain under pressure despite improving wages. Consumers continue to face high costs for groceries, gasoline, electricity, transport and services. The market is watching whether wage gains can continue to offset these everyday expenses.

Companies are also under pressure from higher labor, logistics, materials, borrowing and energy costs. Firms with pricing power, strong brands, stable demand or exposure to long-term investment remain better positioned.

Companies without pricing power face a more difficult environment. If the yen weakens, oil rises and consumers resist further price increases, profit margins could come under pressure even when nominal sales appear resilient.

Semiconductor and AI-related shares helped the Nikkei recover from its intraday low. After broad selling earlier in the day, buying returned to some chip-related names, cushioning the index into the close.

Advantest and Tokyo Electron remained central to the market’s direction. Advantest is one of Japan’s clearest beneficiaries of demand for advanced AI chip testing, while Tokyo Electron is a major supplier of semiconductor manufacturing equipment.

Both stocks have heavy Nikkei weightings, meaning their movements can strongly affect the headline index even when the broader market is weak. Their resilience helped the Nikkei avoid a deeper close.

SoftBank Group also remained closely watched as Tokyo’s most visible proxy for global artificial intelligence investment through its exposure to OpenAI, Arm, robotics and digital infrastructure.

Kioxia Holdings remained a key gauge of confidence in memory chips, high-bandwidth memory, AI servers and data-center storage demand. The stock has been highly volatile since July and continues to move with global semiconductor sentiment.

Ibiden, Fujikura, Furukawa Electric, Murata Manufacturing, TDK, Taiyo Yuden, Lasertec, Screen Holdings and Kokusai Electric also remain central to Japan’s AI supply-chain story. These companies represent advanced substrates, optical fiber, electronic components, chip equipment, power systems and data-center infrastructure.

The AI trade remains powerful but unstable. Investors continue to believe in long-term demand for chips, memory, networks, power systems and data centers, but they are now more selective because of valuation, funding costs, regulation, power constraints and the debate over the pace of AI development.

The September 29 session showed that AI and semiconductor shares can still attract dip-buying, but they cannot fully protect the broader market when ex-dividend selling, higher yields and macro uncertainty dominate.

The Nikkei’s official component data showed 37 Nikkei stocks rose and 188 fell, underscoring the narrowness of the support. Technology stocks as a group were negative on the day, while materials and financials also weighed on the index.

That breadth problem remains important. A durable rally needs participation from banks, insurers, exporters, trading houses, industrials, domestic-demand shares and technology names. On September 29, the market was too dependent on late support from a limited group of index-heavy shares.

Pharmaceuticals, pulp and paper, mining, oil and coal products, securities, steel and insurance were among the weaker areas, reflecting a mix of ex-dividend selling, oil-related concern and profit-taking in rate-sensitive sectors.

Electrical machinery was one of the few areas to rise, supported by semiconductor and electronic-component names. That again showed how central technology remains to Tokyo’s market direction.

The Growth Market 250 Index fell, showing that smaller growth shares remained under pressure. Higher yields make it harder for investors to justify valuations in companies whose earnings lie further in the future.

The domestic policy backdrop remains complicated. The BOJ is trying to normalize monetary policy without destabilizing the yen, bond market or equities. A faster rate path would support the yen and help contain import inflation, but could push yields higher and pressure borrowers.

A slower rate path would support equities and limit bond-market stress, but could leave the yen weak and revive imported inflation. This tension remains unresolved after the BOJ’s September rate hike.

Prime Minister Sanae Takaichi’s government faces a similar balancing act. It is trying to support households, expand defense spending and fund long-term strategic investment while debt-servicing costs rise.

The government’s growth strategy calls for large-scale public and private investment through fiscal 2040 in semiconductors, artificial intelligence, energy security, defense, shipbuilding, robotics, space and other strategic sectors.

Those priorities support many of the companies investors continue to favor, including chip-equipment makers, materials suppliers, optical-network firms, power-system companies, data-center infrastructure providers and defense-related manufacturers.

However, higher interest rates make fiscal discipline more important. Investors want evidence that Japan can fund household relief and industrial policy without undermining confidence in public finances.

The ex-dividend effect also complicates short-term interpretation of the market. The Nikkei’s 396-point decline looks significant, but because the dividend adjustment was estimated at around 380 points, the underlying market was much closer to flat.

TOPIX’s larger decline also reflected the broad impact of dividend adjustments on financials and value shares. Investors will need to judge whether selling pressure continues after the mechanical adjustment passes.

The next session will be important because it will show whether the market can stabilize without the distortion of the ex-dividend drop. If the Nikkei quickly reclaims 66,000, investors may view September 29 as a technical adjustment rather than a real reversal.

If the Nikkei remains below 65,500 and TOPIX continues falling, it would suggest that the market’s late-September rally has lost momentum.

The 65,000 level is now a key support area. The Nikkei briefly broke below it on September 29 but recovered into the close. A sustained break would weaken the technical picture and could invite more profit-taking.

The 66,000 level remains the first upside test. The Nikkei failed to hold above 67,000 on September 28 and failed to reclaim 66,000 on September 29, showing that overhead resistance remains strong.

The 67,000 level remains the next major psychological barrier. The market briefly topped it on September 28 but immediately reversed, so investors will need stronger breadth to make another attempt convincing.

The global backdrop remains unsettled. U.S. bond yields are high, U.S. inflation and labor-market data remain important, and the Middle East continues to affect oil prices and risk sentiment.

U.S. consumer confidence weakened sharply in September, according to Reuters reports, adding to concern about the economic outlook even as bond yields remain elevated. That creates a difficult setting for equities because investors must weigh slower demand against persistent inflation pressure.

The dollar remains supported by the interest-rate gap between the United States and Japan. As long as U.S. yields remain high and the BOJ moves gradually, the yen may struggle to strengthen decisively.

For Tokyo, that means exporters may continue receiving currency support, but households and importers may remain under inflation pressure. The market will continue shifting between those two interpretations depending on the day’s news.

What to watch next: whether the Nikkei can recover from 65,481 and move back above 66,000, whether TOPIX stabilizes after the ex-dividend adjustment, and whether the broad market improves after 85% of Prime Market stocks fell.

Investors will monitor Advantest, Tokyo Electron, SoftBank Group, Kioxia, Ibiden, Fujikura, Furukawa Electric, Murata Manufacturing, TDK, Taiyo Yuden, Lasertec and Screen Holdings for signs of whether the AI trade can keep cushioning the Nikkei.

Banks and insurers will also remain important after the dividend adjustment. Mitsubishi UFJ, Sumitomo Mitsui, Mizuho, Resona, Tokio Marine and other financials will show whether higher-rate expectations can again support value shares.

The yen near 157 to the dollar remains the most important domestic signal. Further weakness toward 160 would support exporters but revive inflation and intervention concerns. A rebound toward 153 would ease import costs but pressure exporters and carry trades.

JGB yields are the second key signal. A stable 10-year yield near 3.085% would help equities, while a renewed rise toward fresh multi-decade highs would pressure valuations and fiscal policy.

Oil prices are the third signal. A renewed climb would intensify pressure on Japan’s trade balance and household costs, while a sustained pullback would ease inflation concerns.

September 29 was a technically distorted session because of the ex-dividend adjustment, but the message beneath the surface was still cautious. Tokyo’s market avoided a deeper fall thanks to late futures buying and support for semiconductor shares, yet the broad weakness across Prime Market stocks showed that investors remain wary of high yields, yen weakness, oil risks and the durability of the AI-led rebound.