I've read that during certain circumstances that an increase in stock price can reduce the value of a call option because of a reduction in volatility. With that said, is the above statement something that happens to the majority of options when the market is in a specific phase in this case say a bull and trending or are these types of occurrences usually specific to the stock itself. What I am getting at is if there is some sort of tool that would allow me to find highly liquid options whos prices move very closely with the stock prices (I could be wrong, but for this case to occur would implied volatility need to remain somewhat constant). I appreciate any input. Thanks!