Peter Gratton, Ph.D., is a New Orleans-based editor and professor with over 20 years of experience in investing, economics, and public policy. Peter began covering markets at Multex (Reuters) and has ...

The left side represents the theoretical framework; the top middle contains a labeled box with a circumscribed circle displaying the call and put option prices (c, p), as well as the delta and vega ...

An option contract's price rarely moves for just one reason. The stock shifts, time keeps passing, expectations for volatility rise and fall, and interest rates maintain their influence in the ...