The Week the Rally Met
the Cost of Money

Market Snapshot

Friday left the Nikkei slightly lower and TOPIX slightly higher. For the full week, Tuesday and Wednesday’s reversal overwhelmed Monday’s strength.

Data checked: 2026-08-22 07:54 JST / 2026-08-21 15:54 California time. Cash indexes are Friday closes; FX, bonds and futures are latest public quotes and may vary by venue.

What Moved Tokyo

The Nikkei reached 69,220.25 Monday. Then Middle East tension lifted oil, long yields rose across major markets, and the discount rate applied to distant AI profits became less forgiving.

The Nikkei lost 5.6% and TOPIX 4.1% across Tuesday and Wednesday. Thursday’s rebound followed stabilization in U.S. shares, Korean chips and bonds. Friday’s positive TOPIX but negative Nikkei showed that the broader market held up better than its semiconductor-heavy headline index.

Today’s Market Mover

Semiconductor and AI complex — Advantest (6857), Tokyo Electron (8035), Lasertec (6920)

The week’s mover was the chip-and-AI complex. A global semiconductor retreat, heavy bond issuance to finance AI investment, competition for capital and rising sovereign yields accelerated profit-taking in Tokyo’s highest-multiple names.

The AI demand story did not end; Thursday’s rebound demonstrated its resilience. But the same future earnings are worth less today when money costs more. That repricing made the Nikkei swing more violently than TOPIX.

Sector Pulse

Weak: semiconductor equipment, AI-linked and growth shares, whose high expectations increased their rate sensitivity.

Relatively resilient: banks, insurers, energy and parts of domestic demand. Higher rates or oil supported them, helping TOPIX Friday.

Caught between forces: autos and exporters. A yen near 159 helps translated earnings; expensive oil and doubts about global demand hurt costs and volumes.

Yen Watch

USD/JPY ended Friday at a public close of 158.82 after a 158.36–159.14 range. The yen remained weak but gained modest support from firmer Japanese inflation and broader dollar softness.

That level supports exporters and tourism but raises Japan’s bill for oil, food and industrial inputs. For households and small businesses, the weak yen is a cost before it is a market statistic.

Rates / JGB Watch

The 10-year JGB yield reached 2.945% Tuesday, its highest area in about three decades, before a public Friday quote of 2.875%. Oil, overseas yields and expectations of another BOJ increase all mattered.

Japan’s Ministry of Finance is considering a 3.8% assumed rate for next year’s debt-service calculation, public reporting showed. Rising market rates are moving from theory into the government’s budget arithmetic.

Global Handoff

After Tokyo closed, the S&P 500 and Nasdaq each rose 0.43% Friday, though both declined for the week. Europe’s STOXX 600 lost roughly 1% weekly. Friday’s bounce offers relief, not a complete restoration of risk appetite.

Brent was near $94 and up more than 5% for the week; the U.S. 10-year yield remained in the 4.7% area. A public CME screen showed September Nikkei futures at 65,895, up 0.46%. Futures are a clue, not a guarantee of Monday’s open.

Policy / BOJ Watch

Japan’s July core CPI accelerated to 1.8% from 1.6% in June; inflation excluding fresh food and energy rose 1.9%. With the policy rate at 1%, markets are watching the September BOJ meeting for another increase.

A hike could restrain the yen and imported inflation, but high oil and geopolitical risk can weaken activity, while higher rates lift the government’s financing bill. Stocks, bonds and the currency expressed the same dilemma in different prices.

Publisher’s Market Note

Before the Next Open

• Whether Friday’s U.S. rebound brings bargain hunting back to chip shares.
• Whether USD/JPY breaks above 159 or holds in the 158 area.
• Whether the 10-year JGB returns above 2.9%.
• How Brent near $94 and Middle East news affect transport, chemicals and retail.
• Whether banks keep outperforming and TOPIX stays firmer than the Nikkei.

Sources and Method

This original report uses public exchange, index, government, central-bank and broadly available market information. No paid article text was copied. Quotes can be delayed or vary by venue. This is market journalism, not investment advice.

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