The stock price of Google is $560. You have $10,000 to invest. The monthly interest rate is 0.8%.

Part 1

You think the stock price will go down soon, and want to trade 20 shares. What should you do? Enter 20 for buying 20 shares (on margin if necessary), or -20 for selling or short-selling 20 shares.

Part 2

If the initial margin is 50%, what is the minimum additional dollar amount that you have to deposit in your brokerage account?

Part 3

What is your initial percentage margin (entered as a decimal number)?

Part 4

Two months later, the stock price is $580. Google paid a dividend of $7 per share just before the two months were over. What is your percentage margin (entered as a decimal number)?