市场形态周报（20250901-20250905）：本周指数普遍下跌-20250907

• The Heston model is used to calculate the implied volatility of near-month at-the-money options, serving as the market's fear index. Implied volatility reflects market participants' expectations of future volatility[9] - The industry timing strategy is constructed based on the scissors difference ratio of long and short positions in industry index constituent stocks. If no bullish or bearish signals are present on a given day, the scissors difference value and ratio are set to zero. This model outperformed respective industry indices in backtesting, achieving a 100% outperformance rate[16] - Six technical stock patterns are summarized, including "Golden Needle Bottom," "Rocket Launch," "Full Red," "Hanging Line," "Paradise Line," and "Cloud Line." Positive patterns like "Golden Needle Bottom," "Rocket Launch," and "Full Red" show strong positive signals. Specific stocks with these patterns include Youde Precision, Huicheng Vacuum, and Mingzhi Technology[23][27] - The brokerage gold stock shape signal strategy combines monthly gold stock recommendations with timing signals. Observations show that shape analysis significantly improves portfolio returns and reduces maximum drawdowns. Stocks with 70% bullish shape signals this week include Xianju Pharmaceutical, Jiejie Microelectronics, Ningde Times, Xiechuang Data, and Fosun Pharma[28][29]