yes,Stocks can be sold within a few hours of purchaseHowever, it is important to pay attention to the differences in different marketsTrading Rules、time limitAnd whether there isThe risk of frequent tradingThe following is a specific explanation:

✅ Rules of China A-shares (Shanghai and Shenzhen Stock Exchanges):

• T+1 systemThe stocks bought today,Must wait until the next trading day to sell。

  • Example: If you buy at 10am on Monday, you can sell at 9:30am on Tuesday at the earliest.

  • So in the A-share market,Cannot sell within a few hours after purchase。

✅ Hong Kong Stock Market (HKEX):

• T+0 system(Same day buying and selling allowed):

  • The stocks bought today can beSell at any time on the same daySame day trading is allowed.

  • soCan be sold within a few hours after purchase。

✅ US stock market (US stock market):

• similarlyT+0 systemYou can buy and sell on the same day.

• But if you areAccounts with funds less than $25000Continuous short-term trading (commonly known as "intraday trading")Exceeding a certain number of times(More than 4 times within 5 trading days) will be marked as * * "Pattern Day Trader" * * and may be restricted from trading.

📌 Summary:

📉 If you want to do short-term trading (such as earning spreads within the day):

• A-shares:Not suitable for intraday tradingYou can consider ETFs (such as the CSI 300 ETF with T+0).

• Hong Kong and US stocks:Can trade within the dayHowever, it is important to be aware of the risks associated with handling fees and frequent transactions.