2) At end of Day 1, I invest equal amounts of money in shares of company A and B.

2) At end of Day 1, I invest equal amounts of money in shares of company A and B.
By end of Day 2, the price of company A shares has doubled and the price of company B shares has halved (compared to Day 1 price).

• What is the return on my entire investment from Day 1 to Day 2 ?
• What are the weights of my portfolio at the end of Day 2 ?
• At the end of Day 3, the price of company A shares has halved and the price of company B shares has quadrupled (compared to Day 2 price).

What is the return on my investment from end of Day 1 to end of Day 3 ?