- Nikkei Index is surging on optimism of ceasefire in the Iran war, a drop in oil prices and strong performance by tech stocks
- Japan's Softbank carries a significant weight in the Index and the expected IPOs of OpenAI and SB Energy has excited investors
- However, the Index's strong ties to external markets also predisposes it to a potential sudden reversal
This May, the Japanese stock market presented investors with a series of dynamic shifts. Following a challenging five-session downturn between May 14 and May 20, the benchmark Nikkei 225 Index demonstrated a notable turnaround. The index then experienced a gain exceeding 7% over the subsequent five sessions, surpassing the significant 65,000-point level for the first time and achieving a new record closing high of 65,158.19.
This drastic swing has left market participants wondering what fundamentally shifted in such a short window, and what it implies for Tokyo’s financial outlook through the rest of the year.
What Has Changed in Recent Days?
The rebound appears driven by renewed optimism in technology and artificial intelligence-related stocks. On May 22, the index jumped 2.68% to close at 63,339, with further gains pushing it toward or above 65,000 in subsequent sessions.
SoftBank Group led gains, surging on news of potential IPOs for portfolio companies like OpenAI and SB Energy. The technology investment group surged nearly 20% on May 21 and then an additional 12% on May 22, a combined two-day advance of over 30%. Given SoftBank’s weight in the index, this alone accounted for a substantial portion of the headline move. Other tech names, including semiconductor and electronics firms, contributed significantly.
Easing geopolitical tensions provided additional support. Optimism around U.S.-Iran negotiations and potential de-escalation in the Middle East helped lower oil prices. Given that Japan imports nearly all of its fossil fuels, its economy remains particularly sensitive to developments in the Middle East and global oil markets. Market sentiment saw a noticeable change after positive updates on ceasefire negotiations, fostering broader expectations that the vital Strait of Hormuz waterway would continue to operate unimpeded.
Upbeat Signals for the Broader Japanese Equities Market
The recent performance signals resilience in the Japanese market. Corporate reforms, coupled with improving shareholder returns and a broader movement toward reflation, help to support a longer-term sense of confidence.
For 2026, analysts generally hold a positive view, pointing to projected earnings growth, ongoing fiscal stimulus initiatives, and the anticipated advantages for Japanese exporters and technology companies arising from global AI demand.
Major asset managers, including BlackRock, remain very positive about Tokyo stock exchange. They highlight ongoing corporate governance changes and domestic government backing as significant structural advantages.
Navigating the Underlying Risks
Despite the euphoric push past 65,000, it is not entirely clear sailing ahead. The Nikkei’s rapid-fire turnaround underscores just how dependent the index is on external macro factors.
Should peace talks falter and oil prices climb again, Japan’s energy-dependent economy would quickly feel the strain. Also, the Bank of Japan’s evolving monetary policies could introduce currency risk. Any unexpected interest rate hikes might cause the yen to gain value rapidly, potentially cutting into the converted earnings of Japan’s top exporters.
The rebound was supported by rallies in technology and AI stocks, particularly those led by SoftBank, alongside easing tensions in the Middle East and more moderate inflation figures.
Japan imports much of its oil from the Middle East, which primarily transit through the Strait of Hormuz, thus making its economy particularly sensitive to energy supply disruptions.
SoftBank surged over 30% in two days on OpenAI and SB Energy IPO reports, meaningfully boosting the index.
