股票变动是指股票价格的涨跌。具体来说，股票变动包括上涨和下跌两种情况。当股票价格上涨时，称为上涨或上扬；当股票价格下跌时，则称为下跌或下挫。

股票变动的原因有很多，其中最主要的是市场供求关系的变化。当市场上对某只股票的需求增加，而供给不足时，股票价格就会上涨；反之，当市场上对某只股票的供给增加，而需求不足时，股票价格就会下跌。此外，公司业绩、行业动态、宏观经济等因素也会影响股票价格的变动。

对于投资者来说，股票变动是他们关注的重点之一。因为股票价格的涨跌直接关系到他们的投资收益和亏损。当股票价格上涨时，投资者可以获得盈利；而当股票价格下跌时，投资者则可能面临亏损。因此，投资者需要密切关注市场动态和公司基本面，以便及时做出正确的投资决策。

总之，股票变动是指股票价格的涨跌，是投资者关注的重点之一。投资者需要密切关注市场动态和公司基本面，以便及时做出正确的投资决策。英文文章：

The stock change refers to the rise and fall of stock prices. Specifically, the stock change includes two situations: the increase of stock prices and the decrease of stock prices. When the stock prices rise, it is called increase or appreciation; when the stock prices fall, it is called decrease or decline.

There are many reasons for the change of stock prices. The most important reason is the change of market supply and demand. When the demand for a certain stock on the market increases and the supply is insufficient, the stock prices will rise; conversely, when the supply of a certain stock on the market increases and the demand is insufficient, the stock prices will fall. In addition, factors such as company performance, industry dynamics, and macroeconomics will also affect the change of stock prices.

For investors, the change of stock prices is one of their focuses of attention. Because the rise and fall of stock prices is directly related to their investment income and losses. When stock prices rise, investors can obtain profits; when stock prices fall, investors may face losses. Therefore, investors need to closely monitor market dynamics and company fundamentals in order to make timely and correct investment decisions.

In conclusion, the stock change refers to the rise and fall of stock prices, which is one of the focuses of attention for investors. Investors need to closely monitor market dynamics and company fundamentals in order to make timely and correct investment decisions.