️干货分享：跌透了才叫支撑，没跌透的叫暂时不跌——这点90%的人都搞反了

Group 1 - The core concept of support levels in stock trading is that they act as invisible nets that temporarily hold down prices and may serve as starting points for rebounds [2][19] - Historical support levels are formed by past trading activity where prices have repeatedly bounced back, indicating market memory [3][20] - A specific example illustrates that a stock at 10 yuan has experienced multiple rebounds from this level, establishing it as a historical support point [3][20] Group 2 - Cost support is derived from the average cost of transactions behind each stock, where investors are likely to buy more shares to average down their costs when prices approach their average cost levels [5][22] - Moving averages, such as the 20-day and yearly averages, serve as common indicators of cost support, with the 20-day average representing the average cost of the last 20 trading days [6][22] - A dense distribution of shares at a specific price point indicates stronger support, as more investors are likely to either buy more or hold their positions [6][22] Group 3 - Fundamental support is based on the intrinsic value of a company, where stocks that are undervalued relative to their earnings or dividends attract investors [7][24] - For instance, if a company's annual net profit is stable at 1 billion yuan, its reasonable valuation would be 20 yuan per share based on an industry average P/E ratio of 20 [7][24] - Dividend yield becomes a critical factor for support; as stock prices drop, the yield increases, attracting income-focused investors [7][24] Group 4 - Box range trading indicates a support level that has been validated over time, where stocks oscillate between defined price points, creating a reliable support level at the lower boundary [9][26] - The longer a stock remains within a trading range, the stronger the support becomes, as market participants develop a consensus on buying and selling at these levels [9][27] - A sudden break below this support level, especially with high volume, signals a potential change in market sentiment [9][27] Group 5 - Classic K-line patterns, such as double bottoms, indicate strong support levels when prices bounce back after hitting the same low multiple times [10][28] - Previous resistance levels can turn into support once the selling pressure is absorbed, as investors who were previously trapped at higher prices become more reluctant to sell [10][29] - The effectiveness of support levels must be validated through volume and time; a lack of trading volume at a support level suggests it may not hold [10][30]