Final answer:
In a 2-for-1 stock split, you double your number of shares but the value per share halves, thus your total investment value doesn't change. You now own 600 shares, but your wealth remains the same.
Step-by-step explanation:
The question from the student involves a simple calculation related to a 2-for-1 stock split. Initially, you own 300 shares at $10 each, which amounts to a total investment of $3000. After the stock split, you will own double the number of shares, so 600 shares, but the price per share will also be halved to $5. Therefore, your total investment remains the same at $3000.
Stock splits don't change the overall value of your investment; they simply increase the number of shares you own while proportionately decreasing the price of each share. It's like cutting a cake into more pieces; while you have more pieces, the size of the overall cake hasn't increased. Hence, after the stock split, your wealth has not increased; it has remained exactly the same.
After the stock split, the number of shares you own has increased to 600, but your overall wealth remains unchanged at $3000.