I was hoping any of you experienced call writers could share some of your experience in answering a couple questions I have. What I'm wondering is, is there ever an instance when your strike is reached but the option is NOT exercised? I'm talking about CC's on very liquid stocks or ETFs such as GS, SPY, GLD, OIH, etc. Let's say the strike is breached for just 5 minutes but then price reverses and never looks back - how likely is it that the option WON'T be exercised? I guess a question that goes along with this is how quickly is an option typically exercised once the strike is hit? (in liquid instruments such as the ones listed above). Does it depend on how close you are to expiration? Basically I'm just trying to get a sense of the reliability of options being exercised once the strike is reached. Thanks.