Morning Stock Brief 10/15 (Thu) | The Weight of 'High Interest Rates' Returns Due to Re-accelerating Inflation, and More

Good morning. Here is this morning’s stock market brief.

The free section contains a 30-second summary, while the continuation (full version) provides a deep dive into major global and Japanese news and a breakdown of stocks to watch.

⏱ 30-Second Summary

• U.S. stocks fell on October 14. The S&P 500 closed at 7,718.94 (down 1.1%), the Dow at 51,621.48 (down 0.1%), and the Nasdaq at 26,692.87 (down 1.9%).

• U.S. consumer prices in September rose 3.7% year-on-year, with core inflation at 2.6%, both exceeding market expectations and reigniting concerns over additional interest rate hikes.

• AI and semiconductor stocks, which are vulnerable to rising interest rates, weighed on the market, leading to the S&P 500’s largest decline since July. The divergence in interest rate sensitivity became clearer than the index itself.

• The Nikkei 225 closed at 67,744.29 on October 14, down 0.05%. In the upcoming Tokyo market following the decline in U.S. tech stocks, I want to check the spread between semiconductor stocks and the TOPIX separately.

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From here on, we provide a deep-dive analysis of global and Japanese conditions (viewing each topic from three perspectives: investor, analyst, and contrarian) and a breakdown of stocks to watch.

This morning edition is published in full as a regular free article.

🌍 Global Conditions and the U.S. Market

1. The Weight of ‘High Interest Rates’ Returns Due to Re-accelerating Inflation

U.S. consumer prices in September rose 3.7% year-on-year, and the core index reached 2.6%, both exceeding market expectations. Immediately after the announcement, the U.S. 2-year Treasury yield rose significantly, strengthening the view that policy interest rates will remain high for longer.

From an investor’s perspective, the certainty of earnings that can withstand rising discount rates is as important as strong performance. From an analyst’s perspective, I will check the breakdown of prices and the pricing power of companies. From a contrarian perspective, if long-term interest rates stabilize rather than rising in one direction, I will look for room for a rebound in oversold, high-quality tech stocks.

2. Nasdaq’s Decline Indicates Selection in AI Investment

The Nasdaq fell 1.9%, significantly underperforming the S&P 500. Rising borrowing costs tend to pressure the profitability of data center investments, and the question of whether the high valuations of AI-related stocks can be justified is being asked once again.

Today, I will look at the stabilization of the semiconductor index, the price movements of major cloud and capital expenditure-related stocks, and the reaction of long-term interest rates side-by-side. It is important to see not just a rebound in the index, but whether the number of advancing stocks increases.

🇯🇵 Outlook for the Japanese Market

3. Even if the Nikkei 225 is Flat, Beware of the Ripple Effect of U.S. Tech Declines

The Nikkei 225 closed at 67,744.29 on October 14, down 0.05%. Although the downside was limited following the previous day’s sharp decline, selling pressure on high-priced semiconductor stocks may intensify in the Tokyo market following the subsequent sharp drop in the U.S. Nasdaq.

I will check not only the Nikkei 225 but also the TOPIX, the number of advancing stocks, and the movement of funds into banks, domestic demand-oriented stocks, and high-dividend stocks. If the market as a whole does not collapse even if semiconductor stocks are weak, the difference between indices will serve as a clue for investment decisions.

🔍 Today’s Order of Review

1. Will the US 10-year Treasury yield settle from its post-CPI highs?

2. Will the continued decline in semiconductor and AI stocks stop, and will the Nasdaq’s losses narrow?

3. Will the divergence in direction between the Nikkei 225 and TOPIX widen in the Tokyo market?

4. Will funds diversify into banking, domestic demand, and high-dividend stocks?

👀 Featured Themes

• AI/Semiconductors: The combination of rising interest rates and high valuations

• Financial Stocks: The tug-of-war between expectations for improved margins and concerns over economic slowdown

• Domestic Demand/High Dividend: Destinations for funds diversifying away from large-cap tech

• Forex: The impact of rising US interest rates on the dollar-yen and export stocks

Sources

• AP News ‘How major US stock indexes fared Wednesday 10/14/2026’

• AP News ‘US stocks drop to their worst day since July as inflation worsens’

• Reuters ‘Dollar jumps, stocks and bonds dented by hot US inflation data’

• Reuters ‘Le Nikkei finit en baisse de 0,05%’

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Disclaimer

This magazine is intended for the purpose of organizing and explaining information regarding the stock market and does not recommend the buying or selling of specific stocks. Numerical values and materials are current as of the time of distribution (* indicates unconfirmed information). While we strive for the accuracy of the information posted, we do not guarantee its completeness. Please make final investment decisions based on your own judgment and responsibility.

Thank you for reading this far. See you here again tomorrow morning.