Video: Trading in Royal Mail shares opens Shares in Royal Mail rose by more than a third when they began trading on the stock market today, increasing the value of the business by more than £1 billion. Steven Fine, Managing Director of Peel Hunt said: "The thing I'm most excited about is that this has ushered in a new sense of excitement about equity ownership." The sharp rise of 36% from the 330p offer price to as much as 450p meant 690,000 ordinary investors who have each bought around £750-worth of stock gained more than £270 each. General investors will not be able to cash in on their shares until next Tuesday when full trading begins although those who applied for shares through brokers offering conditional dealing will have been able to trade from today.