中文版

以“73”开头的股票通常是指在香港交易所上市的股票。香港交易所，也称为港交所，是亚洲最大的股票市场之一，其股票代码系统有其独特的规则。

在港交所的股票代码中，前两位数字代表了股票的上市地点。其中，“73”开头的股票代码表示该股票是在香港主板市场上市的。主板市场是香港交易所的主要上市板块，涵盖了众多大型蓝筹股和知名企业。这些公司通常具有较高的市值和稳定的盈利表现，因此吸引了众多投资者的关注。

除了“73”开头的股票代码外，港交所还有其他几种股票代码，如“00”开头的代表恒生指数成份股，“01”开头的代表香港创业板上市的股票等。这些不同的代码为投资者提供了更清晰的分类和识别方式，方便他们更好地了解和选择适合自己的投资标的。

需要注意的是，股票代码只是股票的一个标识，投资者在选择股票时，还需要考虑公司的基本面、行业前景、市场环境等多个因素，进行全面的分析和评估。

英文版

Stocks that start with "73" typically refer to shares listed on the Hong Kong Stock Exchange. Also known as the HKEX, the Hong Kong Stock Exchange is one of the largest equity markets in Asia, and its stock code system has its unique rules.

In the stock codes of the HKEX, the first two digits represent the listing location of the stock. Among them, stock codes starting with "73" indicate that the stock is listed on the main board market of Hong Kong. The main board market is the primary listing segment of the Hong Kong Stock Exchange, encompassing numerous large blue-chip stocks and well-known companies. These companies typically have high market capitalizations and stable earnings performance, thus attracting the attention of many investors.

In addition to stock codes starting with "73", the HKEX also has several other types of stock codes, such as those starting with "00" representing constituents of the Hang Seng Index, and those starting with "01" representing stocks listed on the Hong Kong Growth Enterprises Market. These different codes provide investors with a clearer classification and identification method, facilitating their understanding and selection of suitable investment targets.

It is worth noting that the stock code is only an identifier for the stock. When choosing a stock, investors need to consider various factors such as the company's fundamentals, industry prospects, market environment, etc., and conduct comprehensive analysis and evaluation.