Opening time refers to the time when various financial markets begin trading. Different markets and trading varieties have different opening times, which are based on local trading hours, holidays and market-specific regulations. For example, the opening time of the Chinese stock market is 09:30 am from Monday to Friday, while the opening time of crude oil futures on the Chicago Mercantile Exchange is 09:00 am from Monday to Friday.

Opening time is of great significance in financial markets. During this period, various trading platforms began to receive orders from buyers and sellers, and made a series of operations based on these orders. This is also the time when market prices are most volatile, because investors will focus on buying and selling during this period to determine the market trend. Therefore, it is very important for investors to grasp the opening times of different varieties, which will help determine the correct trading time.

In addition to trading hours, investors should also pay attention to other important information in the market, such as Federal Reserve policy, economic data, etc. This information will also have an impact on market prices, thereby affecting investors' trading decisions. Therefore, understanding market dynamics and tracking market news are the best ways for investors to obtain market information outside the opening hours. Only by maintaining keen observation and good analytical skills can we obtain better investment returns in the financial market.