October 20 confirmed closes meet October 21 morning trading, with chip shares and index concentration back in focus.
October 20 closed with the Nikkei at 64,075.42 (down 1.30%) and TOPIX at 4,009.21 (down 1.43%). The Nikkei rebounded to 64,823.55 (up 1.17%) at the October 21 morning close; TOPIX was 4,060.05 (up 1.27%) at 10:30 a.m., an intraday quote.
This is market journalism, not investment advice. Data checked October 21, 12:00 JST / October 20, 20:00 PDT.
60 reports
October 20 closed with the Nikkei at 64,075.42 (down 1.30%) and TOPIX at 4,009.21 (down 1.43%). The Nikkei rebounded to 64,823.55 (up 1.17%) at the October 21 morning close; TOPIX was 4,060.05 (up 1.27%) at 10:30 a.m., an intraday quote.
October 19 finished with the Nikkei at 64,916.70 (down 0.62%) and TOPIX at 4,067.48 (up 0.04%). At 9:46 a.m. October 20, intraday quotes showed the Nikkei at 64,176.81 (down 1.14%) and TOPIX at 4,025.78 (down 1.03%). October 20 morning closes were unverified.
Tokyo stocks came under selling pressure in AI and semiconductor shares on October 19. A publicly reported 9:20 a.m. Nikkei quote indicated 64,023.59, down 1.99% from the previous close. This is a delayed morning quote, not a verified 11:30 a.m. close.
Tokyo was closed on October 12. Across October 13–16, the Nikkei lost 5.37% to 65,324.29 and TOPIX declined 0.95% to 4,066.00. Selling in heavyweight AI and chip stocks outweighed Friday's recovery.
The October 15 final close put the Nikkei at 64,425.95, down 4.90%, and TOPIX at 3,999.34, down 2.38%. An independently verified October 16 morning close was unavailable; the analysis separates confirmed prices from intraday observations.
On October 14 the Nikkei closed at 67,744.29, down 0.05%, while TOPIX fell 0.34% to 4,096.78. A public October 15 quote at 10:31 a.m. showed the Nikkei near 65,007, about 4% lower; it was not a final morning close.
The Nikkei finished October 13 at 67,777.52, down 1.82%, while TOPIX rose 0.14% to 4,110.67. An October 14 morning snapshot showed a Nikkei rebound around 68,054; the report distinguishes intraday figures from confirmed closes.
Tokyo cash equities were closed October 12. On October 13 the Nikkei opened at 68,564.85 and a timestamped 9:38 a.m. public quote showed 67,684.92. The exact morning closes for both indexes had not been independently established.
There was no Tokyo cash trading on October 12. The October 9 closes were 69,030.92 for the Nikkei and 4,104.81 for TOPIX. The holiday setup reviews currencies, bond yields, oil and technology sentiment ahead of October 13.
For October 5–9 the Nikkei gained about 1.06% to 69,030.92, while TOPIX gained roughly 0.34% to 4,104.81. Early strength in AI and chips collided with funding costs, oil prices and bond yields; Advantest was the featured mover.
October 8 closes: Nikkei 69,042.11, down 1.42%; TOPIX 4,090.19, down 1.54%. BOJ USD/JPY reference was 158.18–19, with the 10-year JGB yield at 3.091%. SoftBank Group fell 4.28% to ¥6,040.
October 7 closes: Nikkei 70,035.71, down 0.92%; TOPIX 4,154.11, down 0.70%. Tokyo Electron fell 2.38% to ¥12,500; the 10-year JGB yield was near 3.11%.
On October 6 the Nikkei closed at 70,683.98, up 1.05%, and TOPIX at 4,183.56, up 0.92%. Advantest rose 3.85% to ¥41,850. October 7's early yen reference was 158.28 per dollar.
October 5 closes: Nikkei 69,946.86, up 2.40%; TOPIX 4,145.22, up 1.33%. A pre-noon October 6 public quote showed the Nikkei at 70,251.44; USD/JPY was about 157.9 and the 10-year JGB yield near 3.105%.
The Nikkei's October 5 morning close reached 70,037.61, up 2.53%. A timestamped TOPIX reading at 11:03 a.m. showed 4,130.73, up 0.97%. Advantest led positive Nikkei point contributions.
The Nikkei gained 2.93% over the week to 68,309.46, while TOPIX lost 0.91% to 4,091.00. Semiconductor enthusiasm lifted the price-weighted index despite pressure from Tokyo inflation, 3% JGB yields and oil above $100.
October 1 closes: Nikkei 68,956.72, up 3.30%; TOPIX 4,131.98, up 0.57%. The Nikkei slipped roughly 1% the following morning as Tokyo core inflation accelerated to 2.7% and the 10-year JGB yield hovered around 3.05%.
September 30 closes: Nikkei 66,753.72, up 1.94%; TOPIX 4,108.65, up 1.67%. On October 1 the Nikkei opened 0.53% higher while TOPIX opened 0.29% lower. Tokyo Electron and the AI supply chain were in focus.
September 29 closes: Nikkei 65,481.27, down 0.60%; TOPIX 4,041.13, down 1.72%. Chip-related buying lifted the next opening to 66,128.59 on the Nikkei, up 0.99%, with JGB yields still above 3%.
The September 28 rally reversed, followed by more weakness on September 29. September 28 closes were 65,877.62 for the Nikkei, down 0.73%, and 4,112.00 for TOPIX, down 0.40%. The report separates ex-dividend adjustments from financing concerns.
At a confirmed 10 a.m. observation the Nikkei was 66,657.73, up 0.44%, and TOPIX 4,146.57, also up 0.44%. A firmer yen and JGB yields near 3.1% complicated the recovery. SoftBank Group was the featured share.
Tokyo traded only Thursday and Friday after the Silver Week holidays. The Nikkei gained 2.07% from the previous week's close, while TOPIX rose 0.92%, with chips, banks, dividends and rates shaping the abbreviated week.
September 24 closes: Nikkei 65,513.99, up 0.76%; TOPIX 4,075.30, down 0.39%. On September 25 both indexes gained more than 1% at the morning close. Ibiden and the broader chip supply chain were in focus.
After the holiday break the Nikkei reached 65,883.41 at the morning close, up 1.33%, while TOPIX rose just 0.12% to 4,096.01. SoftBank Group financing, the yen and the BOJ policy transition remained central.
Cash shares were closed for the September 21 holiday. Public currency reporting put USD/JPY at 156.89 near midday. The note examines SoftBank financing and BOJ policy before trading resumed on September 24.
September 18 ended with the Nikkei at 65,018.95, up 1.38%, while TOPIX slipped 0.07% to 4,091.14. Both indexes were up over the week, amid rate decisions and uneven gains across individual stocks.
At the morning close the Nikkei rose 0.82% while TOPIX fell 0.44%. After the BOJ decision a 12:45 p.m. quote showed the Nikkei up 1.87%, although more than 70% of Prime Market stocks had fallen during the morning.
September 16 closes: Nikkei 63,923.00, up 0.69%; TOPIX 4,061.72, up 0.61%. On September 17 the Nikkei's morning gain was slight while TOPIX rose 0.72%, with bank and insurer stocks supported ahead of the BOJ.
September 15 closes: Nikkei 63,484.10, down 0.01%; TOPIX 4,037.16, down 0.52%. Next morning energy shares gained while large AI stocks pressured the Nikkei; ENEOS rose alongside oil near $105 a barrel.
The Nikkei lost 0.81% on September 14 even as TOPIX gained 0.74%. September 15's morning close reversed the split: Nikkei up 0.93%, TOPIX down 0.03%. SoftBank Group rebounded after the previous day's double-digit fall.
The Nikkei was down 0.80% at the morning close while TOPIX gained 0.66%. SoftBank Group fell more than 11% at an early afternoon quote. The divergent benchmarks exposed the narrow concentration of AI stocks in the Nikkei.
For September 7–11, the Nikkei declined 1.55% and TOPIX 1.83%. Howa Machinery soared as Prodrone announced a manufacturing facility and investment linked to the firm's Aichi site.
September 10 closes: Nikkei 65,270.95, up 0.20%; TOPIX 4,054.58, up 0.20%. On September 11 the morning closes dropped 2.76% and 1.09%, respectively, amid higher oil prices, yields and AI-related selling.
September 9 closes: Nikkei 65,142.78, down 0.19%; TOPIX 4,046.64, down 0.09%. Both fell further by the next morning close, though financial shares provided partial support.
Both major indexes fell on September 8, but by early afternoon September 9 the Nikkei was up 0.34% and TOPIX up 0.36%. Fujikura, Sumitomo Electric and Furukawa Electric drew interest around optical communications demand.
September 7 ended with the Nikkei up 2.12% and TOPIX up 0.55%. Around 1 p.m. September 8, the Nikkei was still up 0.40% while TOPIX fell 0.42%, exposing different exposures to the AI trade.
SoftBank Group rose more than 8%, lifting the Nikkei even as Prime Market decliners outnumbered advancers at the morning close. TOPIX also advanced but the breadth of the rally was limited.
The Nikkei lost 2.09% during the week and TOPIX declined 1.05%. The 10-year JGB yield reached 3% for the first time since 1996 as BOJ expectations and global bond selling intensified.
On September 3, Nikkei lost 0.17% and TOPIX rose 0.50%. The September 4 intraday Nikkei rebounded while the TOPIX morning close was slightly lower, with SoftBank up more than 10% at midday.
Around 1 p.m. the Nikkei was modestly higher while TOPIX was up 1.04% at its morning close. Trading houses and financial stocks benefited as bond selling eased, with Mitsubishi Corporation in focus.
The Nikkei fell 2.85% and TOPIX 2.40%. SoftBank Group declined 6.42% as investors reassessed highly valued AI shares amid oil, exchange-rate and bond-yield pressures.
On August 31 the Nikkei fell 0.14% and TOPIX rose 0.23%. Early September 1 quotes again showed a weaker Nikkei and stronger TOPIX, with Tokyo Electron and 10-year JGB yields near 3% in focus.
The Nikkei fell 1.57% by midday while TOPIX was down 0.43%, reflecting heavy selling in high-priced semiconductor and AI shares such as Advantest, Tokyo Electron and SoftBank Group.
The Nikkei gained 0.59% over the week, against a 1.95% rise for TOPIX. Broader participation in banks, insurers, autos and domestic demand stocks contrasted with narrow AI leadership.
After a mixed August 27 close, the Nikkei and TOPIX were both higher by early afternoon August 28. Advantest led index contributions as investors digested Nvidia's earnings and outlook.
Advantest had boosted the Nikkei by more than 300 points on August 26 but subtracted about 198 points the next morning. The index's dependence on chip-testing shares became especially visible.
Both indexes finished August 25 up 0.50% and gained again by the August 26 morning close. Advantest was the leading positive Nikkei contributor amid falling oil prices and easing U.S. yields.
The Nikkei and TOPIX gained 0.11% and 0.33%, respectively, by the morning close. Fujikura rose 6.02% on AI data-center optical infrastructure enthusiasm, though no new firm-specific announcement was established.
A delayed Nikkei quote showed losses, while an official TOPIX intraday reading showed gains. SoftBank Group fell 4.57% at 1:04 p.m. against concerns about leverage and AI funding commitments.
The Nikkei dropped 3.93% and TOPIX fell 3.10% across the week. Chip and AI stocks including Advantest, Tokyo Electron and Lasertec were pressured by higher global yields, oil and geopolitical concerns.
The Nikkei fell at an 11:35 a.m. delayed quote while TOPIX was near flat by the afternoon. Asics declined 5.59% by 11:30 a.m. after earlier earnings optimism met global yield pressure.
The Nikkei rose intraday after the previous selloff, while TOPIX was reported firmer without a verified exact level. Daiichi Sankyo gained around 4.7% as global bond pressures eased; no new company catalyst was confirmed.
Both indexes fell. SoftBank Group was down 9.85% at 2:02 p.m. as AI valuation concerns, reported debt financing and higher yields intersected.
Both indexes declined as Brent crude remained above $91. INPEX rose 3.31%, diverging from the broader market amid attention to energy supply risk and imported inflation.
The Nikkei was little changed while TOPIX fell. Mitsui Kinzoku gained more than 3% as nonferrous metal stocks led sectors following solid first-quarter results and demand for AI-related copper foil.
Both indexes gained. Nintendo rose about 6.3% on a delayed afternoon quote following news that Pokémon Pokopia had sold five million units worldwide.
Advantest led the day's focus on semiconductor-testing equipment, a softer yen, BOJ expectations and the Nikkei's concentration in technology stocks.
Cash shares were closed for Mountain Day. The setup considers the previous close and the influence of AI chip-testing stocks, the yen and Japanese government bonds.
Fujikura and the data-center optical-fiber supply chain were in focus as markets balanced AI demand against currency moves and BOJ expectations.
Lasertec was the highlighted mover in a week shaped by AI semiconductor expectations, exchange rates and differences between the Nikkei and TOPIX.
