smile
n.— «A reference to the common shape of a graph of at- or out-of-the-money put and call implied volatilities for options with a common expiration date. The name comes from the fact that the furthest out of the money options generally have the highest implied volatilities, causing the ends of the graph to turn up. » —by Gary L. Gastineau, Mark P. Kritzman Dictionary of Financial Risk Management , 1999. (source: Double-Tongued Dictionary)
Further reading
While reading Great Expectations (Bookshop|Amazon) by Charles Dickens, a listener in Arlington, Texas, is surprised when one of the characters inherits some money, which Dickens describes as a cool four thousand. Were they really using cool that way...
An anadrome is a word that forms a whole new word when you spell it backwards. For example, the word “stressed” spelled backwards is “desserts.” Some people’s first names are anadromes. There’s the girl named Noel...