1. Bull market: A bull market refers to a market situation in which stock market prices rise and investor confidence is high. In a bull market, stock prices continue to rise, trading activity increases, and the market atmosphere is optimistic. This kind of market is often accompanied by positive factors such as economic growth and good corporate profits. Investors generally believe that the market prospects are promising and buy and hold stocks one after another. Bull markets are typically accompanied by rising stock prices, larger trading volumes, and the continuation of the market's upward trend.

2. Bear market: A bear market refers to a market situation in which stock market prices fall and investor confidence is low. In a bear market, stock prices generally fall, trading activity decreases, and the market atmosphere is pessimistic. This kind of market is usually accompanied by adverse factors such as economic recession and declining corporate profits. Investors are generally cautious about the market prospects and sell stocks or wait and see.