What about liquidity? How do you know how liquid an option is? How many can you get in/out of? I imagine daily volume would be an indication, but besides that. Sorry, it's a naive dummy question. www.wileyindia.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/9/7/9788126510122.jpg