The Myth of Option Weekend Decay
While doing simulations on volatility and the square root of time, I started thinking about how options experience time—is it calendar time, market time, or something in-between? The CBOE’s VIX® calculations use calendar time, a 365 day year, but most option gurus recommend using a 252 day year for volatility calculations—the typical number of trading days per year in the USA markets. When it comes to …
