1.1. Your brother calls you on the phone telling you that Google's share price has fallen by about 25% over the past few days. Now you can own one small slice of Google for only $430 a share

(the price on the day this question was written).

Your brother says he is pretty sure the stock is going to head back up to $600 very soon and you should buy.

Should you believe your brother? Hint:

Remember someone is selling shares whenever someone else is buying.