Expiration (options)In finance, the expiration date of an option contract (represented by Greek letter tau, τ) is the last date on which the holder of the option may exercise it according to its terms. In the case of options with "automatic exercise", the net value of the option is credited to the long and debited to the short position holders. Typically, exchange-traded option contracts expire according to a pre-determined calendar. For instance, for U.S.
Rational pricingRational pricing is the assumption in financial economics that asset prices – and hence asset pricing models – will reflect the arbitrage-free price of the asset as any deviation from this price will be "arbitraged away". This assumption is useful in pricing fixed income securities, particularly bonds, and is fundamental to the pricing of derivative instruments. Arbitrage is the practice of taking advantage of a state of imbalance between two (or possibly more) markets. Where this mismatch can be exploited (i.
Option styleIn finance, the style or family of an option is the class into which the option falls, usually defined by the dates on which the option may be exercised. The vast majority of options are either European or American (style) options. These options—as well as others where the payoff is calculated similarly—are referred to as "vanilla options". Options where the payoff is calculated differently are categorized as "exotic options". Exotic options can pose challenging problems in valuation and hedging.
Évaluation d'optionL'évaluation d'une option (un droit d'acheter ou de vendre) est l'estimation de la prime à débourser pour l'acquérir qui représente la probabilité d'exercer celle-ci : plus l'exercice est probable, plus l'option sera chère.
Produit dérivé financierUn produit dérivé ou contrat dérivé ou encore derivative product est un instrument financier : dont la valeur fluctue en fonction de l'évolution du taux ou du prix d'un autre produit appelé sous-jacent ; qui requiert peu ou pas de placement initial ; dont le règlement s'effectue à une date future. Ce produit consiste en un contrat entre deux parties, un acheteur et un vendeur, qui fixe des flux financiers futurs fondés sur ceux d'un actif sous-jacent, réel ou théorique, généralement financier.
Lattice model (finance)In finance, a lattice model is a technique applied to the valuation of derivatives, where a discrete time model is required. For equity options, a typical example would be pricing an American option, where a decision as to option exercise is required at "all" times (any time) before and including maturity. A continuous model, on the other hand, such as Black–Scholes, would only allow for the valuation of European options, where exercise is on the option's maturity date.
