Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Options for dummies. Can you explain how puts & calls work, simply?
A 'Call' gives you the right, but not the obligation, to buy a stock at a particular price. The price, called the "strike price" is fixed when you buy the option. Let's run through an example - AAPL trades @ $259. You think it's going up over the next year, and you decide to buy the $280 Jan11 call for $12.  Here are the details of this trade. Your cost is $1200 as options are traded on 100 shares each. You start to have the potential to make money only as Apple rises above $280 and the option trades "in the money." It would take a move to $292 for you to break even, but after that, you are making $100 for each dollar it goes higher. At $300, your $1200 would be worth $2000, for example. A 16% move on the stock and a 67% increase on your money. On the other hand, if the stock doesn't rise enough by January 2011, you lose it all.  A couple points here - American options are traded at any time. If the stock goes up next week, your $1200 may be worth $1500 and you can sell. If the option is not "in the money" its value is pure time value. There have been claims made that most options expire worthless. This of course is nonsense, you can see there will always be options with a strike below the price of the stock at expiration and those options are "in the money." Of course, we don't know what those options were traded at.  On the other end of this trade is the option seller. If he owns Apple, the sale is called a "covered call" and he is basically saying he's ok if the stock goes up enough that the buyer will get his shares for that price. For him, he knows that he'll get $292 (the $280, plus the option sale of $12) for a stock that is only $259 today. If the stock stays under $280, he just pocketed $12, 4.6% of the stock value, in just 3 months. This is why call writing can be a decent strategy for some investors. Especially if the market goes down, you can think of it as the investor lowering his cost by that $12. This particular strategy works best in a flat to down market. Of course in a fast rising market, the seller misses out on potentially high gains.  (I'll call it quits here, just to say a Put is the mirror image, you have the right to sell a stock at a given price. It's the difference similar to shorting a stock as opposed to buying it.) If you have a follow up question - happy to help. EDIT - Apple closed on Jan 21, 2011 at $326.72, the $280 call would have been worth $46.72 vs the purchase price of $12. Nearly 4X return (A 289% gain) in just over 4 months for a stock move of 26%. This is the leverage you can have with options. Any stock could just as easily trade flat to down, and the entire option premium, lost.