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This study uses the relevant business cycle indicators compiled by the National Development Council and the sales value of four categories of glasses, such as "general glasses", "sun glasses", "contact lenses", and "other lenses and accessories" announced by the Statistics Department of the Ministry of Economic Affairs. From January 1994 to December 2018, a total of 300 months of data were explored to explore the leading/lagging situation, the degree of influence, and the order of leading and lagging between the comparison and the high and low points of Taiwan's business cycle and stock market benchmark date.1.The sales value of the four major types of glasses in this study was booming, and the market's demand for eyewear products became more conservative. When the boom climbed from the bottom, it stimulated the eyewear products, which in turn drove the production value of the eyewear products.2.The sales value of other mirrors and spare parts and the sales value of general eyeglasses lead the average value of the lagging index, regardless of whether they are ahead of the base day during peak or trough periods, which represents that the sales value of other mirrors and parts and general eyeglasses are sold well by the market Welcome, the sales value index of other mirrors and spare parts and the general glasses sales value can be used as the leading indicators of the boom and stock market. 3.Sunglasses and contact lenses have the lowest volatility in the peak or valley period because they are close to the characteristics of people's livelihoods; on the contrary, the volatility of the general glasses and other mirrors and spare parts manufacturing industry in the peak or valley period Both are the highest, and the fluctuation gap during the valley bottom period is larger than that during the peak period.
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