1. Trend refers to the overall trend, and the market as a whole shows a correction. For stocks with relatively large gains in the previous period, such as steel and nonferrous metals. All the stocks that pulled up the market in the early stage will inevitably fall first.

2. Plate linkage effect, that is, as long as the leading stock in one plate falls, other stocks in the plate will follow suit. Baosteel, WISCO, Angang and other leading companies have almost the same overall decline, and the rise and fall of these leading companies directly affect the trend of other steel stocks.