Japan's Nikkei 225 index climbed 5,230 yen in a single week (June 15–19), breaking 70,000 yen on geopolitical relief and investor short-covering, but gains have been concentrated in AI and semiconductor stocks. Investors who missed the rally now face a tension between avoiding overvalued entry points and the psychological pressure of being left behind, though the article suggests overlooked sectors may present opportunities.
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The Nikkei 225 rose 5,230 yen in the week of June 15–19 (the largest weekly gain on record), driven by reports of a U.S.–Iran conflict resolution agreement and short-covering. The index broke 70,000 yen for the first time on June 16, reaching near 72,000 yen by June 19, with a record high of 72,353 yen on June 22.
Why it matters
The rally has been dominated by semiconductor and AI-related stocks benefiting from generative AI data center demand, leaving non-AI stocks flat or declining. This two-tier performance has created anxiety (described as "FOMO"—fear of missing out) among investors who missed the AI boom, making them reluctant to buy at record price levels yet fearful of being left further behind.
What to watch
The article signals that on June 19 an interesting market shift occurred that may offer a path for investors who missed the initial AI surge, hinting at overlooked stocks with strong upside revision potential—a detail expanded on in the article's second section.
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