smile
n.— «The pattern of implied volatilities form a “smile” shape, which is called a volatility smile. Most derivatives markets exhibit persistent patterns of volatilities varying by strike…In practice, either the term “volatility smile” or “volatility skew” (or simply skew) may be used to refer to the general phenomena of volatilities varying by strike. Indeed, you may even hear of “volatility smirks” or “volatility sneers”, but such names are often as much whimsical as they are descriptive of any particular volatility pattern.» —“Volatility Skew” riskglossary.com , 2004. (source: Double-Tongued Dictionary)
Further reading
Lee in Charleston, South Carolina, remembers her dad used to refer to a blue patch of sky after a rain as kitten’s britches. Similar terms include Dutchman’s trousers, old woman’s apron, and cat’s vest, all suggesting that...
The adjectives canine and feline refer to dogs and cats. But how does English address other groups of animals? Plus, cabin fever has been around much longer than the current pandemic. That restless, antsy, stir-crazy feeling goes back to the days...