Core Viewpoint - The Nikkei average index has reached new highs in September, raising concerns among investors about potential overvaluation and the risk of a market correction similar to past events [2][4][6]. Price Fluctuation Indicators - The Nikkei average index is currently 16% above the 200-day moving average, a level reminiscent of the period before a significant drop in July 2024 [4][5]. - The Relative Strength Index (RSI) stands at 79.6%, indicating overbought conditions as it exceeds the 70% threshold [5][6]. - The price-to-earnings ratio (PER) is at 18.3 times, within the range observed post-Lehman crisis, while the price-to-book ratio (PBR) is at 1.6 times, indicating potential upper limits [5]. Supply and Demand Dynamics - The credit buying balance is at 4.1891 trillion yen, which is below the year's peak and the levels seen before the summer 2024 drop, suggesting no overheating in this area [6]. - The arbitrage trading buy balance has slightly increased to over 1 billion shares, indicating a mild overheating due to stock splits and other factors [5][8]. - The credit selling balance has reached a six-year high at 1.1229 trillion yen, indicating a significant number of investors are shorting stocks, which could lead to a buying rush if positive news emerges [8]. Market Sentiment and Future Outlook - There are mixed sentiments regarding the market's future, with some analysts suggesting the Nikkei average could rise to around 47,000 points by year-end due to ongoing corporate stock buybacks [9]. - Despite the current indicators suggesting potential overvaluation, some experts argue that the market may continue to rise unexpectedly, highlighting the unpredictable nature of stock movements [9].

Group 1 - The Nikkei average stock index experienced significant volatility influenced by the Trump administration's stance on "reciprocal tariffs" [1][2] - The upcoming negotiations between Japan and the US regarding tariffs are generating mixed market sentiments, with expectations for progress alongside concerns about potential yen appreciation impacting corporate performance [1][4] - Analysts warn that if the yen appreciates rapidly, it could lead to a decline in corporate earnings, raising fears of a "double bottom" scenario in the Japanese stock market [1][2][8] Group 2 - The US government aims to protect domestic manufacturing through reciprocal tariffs, with currency manipulation by Japan and China being a critical issue in negotiations [6][7] - Analysts estimate that a 1 yen appreciation could reduce overall profits in the Japanese stock market by approximately 0.4%, with a 5 yen appreciation potentially leading to a 2% decline in earnings [7] - The Bank of America Securities notes that the impact of yen appreciation on corporate performance is diminishing due to increased local production and sales by Japanese companies [8] Group 3 - Key support levels for the Nikkei average stock index are identified, with a significant threshold at approximately 39,900 points based on a price-to-book ratio (PBR) of 1.15 [10] - If the index falls below this level, the next critical support could be around 30,420 points, calculated from a recent high, indicating potential for sustained market weakness [11] - Historical context suggests that a drop to around 27,920 points, where Warren Buffett previously invested, could signify a return to previous market expectations for Japan's economic growth and structural reforms [11]