Time Decay Functions

Definition

Time decay functions, frequently represented by the Greek letter theta, quantify the erosion of an option’s extrinsic value as the contract approaches its expiration date. Within cryptocurrency markets, these functions accelerate significantly due to heightened underlying asset volatility and the truncated time horizons common in short-term digital derivative contracts. Quantitative analysts monitor this phenomenon to assess the diminishing probability of an option finishing in-the-money, thereby directly influencing the premium pricing of decentralized finance protocols.