The correct answer is: C. beginning price
The capital gains yield is the annual rate of return that an investor earns from the purchase and sale of a stock. It is calculated by dividing the capital gain (the difference between the purchase price and the sale price) by the purchase price. The expected rate of return for constant growth is the rate of return that an investor expects to earn from a stock over a period of time. It is calculated by dividing the capital gains yield by the growth rate.
The beginning price is the price of a stock at the beginning of a period of time. It is used to calculate the capital gains yield and the expected rate of return for constant growth.
The ending price is the price of a stock at the end of a period of time. It is not used to calculate the capital gains yield or the expected rate of return for constant growth.
The regular price is the price of a stock that is traded on a regular basis. It is not used to calculate the capital gains yield or the expected rate of return for constant growth.