Thanks for the great words about the Digital Altitude Review! This means that if you can get 1,000 people to pay for their service in a month, you’d earn $120,000 from DreamHost the next month. The following are many other interesting problems which can be used using XOR operator. Find the Missing Number, swap two numbers without using a temporary variable, A Memory Efficient Doubly Linked List, and Find the two non-repeating elements. There are many more (See this, this, this, this, this and this) When a stock’s market price rises above the strike price, a put option is out of the money. This means that, other than the premium, the option has no value and the price is close to nothing. The reason is simple: you would have to pay more for the shares than the strike price you would get by exercising the option to sell the shares. Consequently, once the stock price rises to the strike price of a put option, the price of the option reaches zero and stays there unless the stock price drops below the strike price.