Let's say I believe that a stock will go up 10%, after the release of earnings. It may take 1 day or 2 weeks. I want to be a call buyer, and not a put seller because I do not want to be short put if the company misses earnings and the stock gaps down. When buying the call, what are the factors that I need to consider? What would be the fair price? If I have 3:1 risk/reward, is that good? I'm reading Hull right now but would like to get some ideas from the pros here. Thanks in advance.