TOKYO - Japanese stocks rebounded sharply on October 16, with the Nikkei 225 closing 898 points higher at 65,324, a gain of 1.39%, as investors returned to technology, semiconductor and financial shares following six consecutive sessions of losses. The recovery came after a dramatic sell-off the previous day, when the benchmark plunged 3,318 points, its third-largest point decline on record, reflecting growing concerns about the sustainability of global artificial intelligence investment and its impact on corporate earnings.
The broader TOPIX index climbed approximately 66 points to 4,066, recovering the psychologically important 4,000 level after falling below it on October 15. Buying was widespread across the Tokyo Stock Exchange, with 1,292 companies in the Prime Market advancing against 224 decliners and 30 unchanged. Of the exchange's 33 industry groups, 32 finished higher, illustrating the breadth of the recovery.
The Nikkei opened 499 points higher at 64,925 and extended its gains throughout the morning as investors bought back shares that had suffered heavy losses. The index briefly rose more than 1,200 points during the afternoon, reaching approximately 65,712, before profit-taking reduced its advance toward the close.
Despite Friday's improvement, the rebound recovered only part of the previous day's losses, underscoring the fragile condition of investor sentiment after a week of unusually large market fluctuations. The Nikkei had declined for six consecutive sessions before Friday's recovery, with concerns about artificial intelligence valuations spreading from Wall Street to Asian financial markets.
Semiconductor-related shares provided significant support. Tokyo Electron was the largest positive contributor to the Nikkei, adding approximately 134 points to the benchmark, while SoftBank Group contributed another 74 points. Electronics materials manufacturer Ibiden, semiconductor testing equipment maker Advantest and other technology-related companies also helped lift the index.
The recovery followed a stabilization in U.S. technology shares overnight. Investors had previously sold semiconductor and data-center-related stocks because of concerns about the substantial borrowing required to finance artificial intelligence infrastructure and uncertainty over whether future earnings would justify the investment.
The sell-off had particularly affected Japanese companies supplying semiconductor manufacturing equipment, advanced electronic components and other products supporting the global expansion of artificial intelligence computing capacity.
However, the sector's rebound did not eliminate the underlying concerns. Investors remain increasingly sensitive to signs that financing costs, construction expenses and slower-than-expected returns could undermine the profitability of the artificial intelligence industry. The coming corporate earnings season is expected to provide an important test of whether the rapid growth in technology-related investment is translating into sustainable profits.
Financial shares also contributed to the broader market recovery, with major banking groups attracting renewed buying interest. Mitsubishi UFJ Financial Group and Mizuho Financial Group advanced during the session, reflecting a return of investor appetite for established financial institutions after the previous day's market-wide retreat.
Consulting company BayCurrent was among the strongest performers, surging more than 17% after announcing plans to deploy surplus cash for investments and share repurchases. Its performance highlighted continued investor interest in companies demonstrating clear capital allocation policies and potential improvements in shareholder returns.
The yen traded around 157 to 158 against the U.S. dollar during the session, with foreign exchange movements relatively subdued compared with the turbulence in equity markets. The currency's stability provided a more predictable trading environment for Japanese exporters, although international monetary policy developments remain a significant source of uncertainty.
The Bank of Japan's future interest rate policy also remains an important consideration for investors. Governor Kazuo Ueda has reiterated that further increases in interest rates will depend on economic conditions, leaving financial markets focused on the outlook for wages, inflation and domestic economic activity.
Internationally, the dollar came under pressure as investors reassessed expectations for U.S. monetary policy following the recent sell-off in artificial intelligence-related shares. The Federal Reserve's interest rate outlook, together with concerns about corporate borrowing costs, continues to influence global investment flows and valuations.
Asian markets generally recovered alongside Japan. South Korean equities, which had been particularly affected by selling in semiconductor and memory-chip companies, rebounded strongly, while other regional exchanges recorded more moderate gains. The synchronized recovery suggested that investors were reassessing the scale of the technology sell-off rather than responding to a fundamental improvement in the global economic outlook.
Nevertheless, uncertainty remains over the direction of energy prices and the consequences of continued geopolitical tensions in the Middle East. Brent crude remained above $105 a barrel, maintaining pressure on energy-importing economies such as Japan.
For Japanese businesses, elevated energy costs present risks to corporate profitability and household purchasing power, particularly if higher transportation, electricity and raw material expenses are passed on to consumers. These pressures also complicate the monetary policy outlook because higher imported inflation can coexist with weaker underlying domestic demand.
The latest market movements have reinforced the distinction between companies benefiting from structural investment in artificial intelligence and those whose valuations depend heavily on expectations of rapid future growth. Investors are paying closer attention to cash generation, borrowing requirements, profitability and shareholder returns as the next round of corporate results approaches.
Although Friday's rebound provided some relief after one of the Tokyo market's steepest single-day declines, the week's volatility demonstrated how closely Japanese equity valuations have become linked to developments in the U.S. technology industry. The recovery was broad-based, but the scale of the preceding losses suggests investors remain cautious about committing substantial new funds before receiving clearer evidence of sustainable earnings growth.
