 Welcome to the course on weekly options and the study of options expiration dynamics. In this course we are going to use these two terms fairly interchangeably because when we want to study options expiration dynamics then we are really looking at weekly options because now there is weekly options on pretty much all optionable stocks or at least a majority of them and all the indices as well as the ETF. So things have really changed in the world of weekly options and then you have two weekly and three weekly as well. So pretty much you have a weekly option every week. So when we talk of expiration dynamics, we are generally talking about the time period when the options come down into the final two weeks, three weeks, somewhere there and so there are dynamics that vary from one week to the other. So in fact this is actually a very good feature for option traders because now you have the flexibility to construct strategies based on differences between one week and another especially when the option comes into its final 30 days. And so that's when a lot of the Greeks go berserk, time decay is rampant, it's exponential, but even from week to week there are so much differences that it becomes very very interesting. And so it's become important for option traders to understand how these weeklies work. Now there's a lot of reward to weekly options, but there's a lot of risk as well. So you just need to be aware of both sides of the coin when it comes to weekly options. So we're going to cover all of this in this course and especially we'll be looking at the, when we say the expiration dynamics we're looking at really the last 10, 12 days, 15 days at most. So when the options come down to that kind of a time frame, the Greeks and the behavior of these options changes very dramatically and so that's really the most interesting part. That's the part that we want to really study. So welcome to this course again. We'll use the term weekly options and options expiration dynamics sort of interchangeably. They mean the same thing or at least the study or the analysis is the same thing as to what happens to options when they approach the final couple of weeks in their lifetime.