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  2. Implied volatility - Wikipedia

    en.wikipedia.org/wiki/Implied_volatility

    However, for most practical pricing models, such as a binomial model, this is not the case and vega must be derived numerically. When forced to solve for vega numerically, one can use the Christopher and Salkin method or, for more accurate calculation of out-of-the-money implied volatilities, one can use the Corrado-Miller model. [5]

  3. Instrumental variables estimation - Wikipedia

    en.wikipedia.org/wiki/Instrumental_variables...

    The standard IV estimator can recover local average treatment effects (LATE) rather than average treatment effects (ATE). [1] Imbens and Angrist (1994) demonstrate that the linear IV estimate can be interpreted under weak conditions as a weighted average of local average treatment effects, where the weights depend on the elasticity of the ...

  4. Latin numerals - Wikipedia

    en.wikipedia.org/wiki/Latin_Numerals

    Et is not used when there are more than two words in a compound numeral: centum trīgintā quattuor. The word order in the numerals from 21 to 99 may be inverted: ūnus et vīgintī. Numbers ending in 8 or 9 are usually named in subtractive manner: duodētrīgintā, ūndēquadrāgintā.

  5. List of abbreviations used in medical prescriptions - Wikipedia

    en.wikipedia.org/wiki/List_of_abbreviations_used...

    not more than noct. nocte: at night non rep. non repetatur: no repeats (no refills) NPO, n.p.o. nil per os: nothing by mouth AMA style avoids use of this abbreviation (spell out "nothing by mouth") NS normal saline (0.9%) 1/2NS half-normal saline (0.45%) NTE not to exceed o 2, o 2 both eyes "O 2" usually means oxygen or oxygen therapy: o.d ...

  6. IVX - Wikipedia

    en.wikipedia.org/wiki/IVX

    This means that implied volatility values of Call and Put option in the pair are sufficiently close. Briefly, the filtering algorithm tries to eliminate suspicious option contract to make sure that the resulting IV Index figure is relevant. In the very same way, the IV Index for May expiry is calculated, "IVX May".

  7. List of numeral systems - Wikipedia

    en.wikipedia.org/wiki/List_of_numeral_systems

    "A base is a natural number B whose powers (B multiplied by itself some number of times) are specially designated within a numerical system." [1]: 38 The term is not equivalent to radix, as it applies to all numerical notation systems (not just positional ones with a radix) and most systems of spoken numbers. [1]

  8. Genealogical numbering systems - Wikipedia

    en.wikipedia.org/wiki/Genealogical_numbering_systems

    In the Henry System, when there are more than nine children, X is used for the 10th child, A is used for the 11th child, B is used for the 12th child, and so on. In the Modified Henry System, when there are more than nine children, numbers greater than nine are placed in parentheses. Henry Modified Henry 1. Progenitor 1.

  9. Return period - Wikipedia

    en.wikipedia.org/wiki/Return_period

    For example, a 10-year flood has a 1/10 = 0.1 or 10% chance of being exceeded in any one year and a 50-year flood has a 0.02 or 2% chance of being exceeded in any one year. This does not mean that a 100-year flood will happen regularly every 100 years, or only once in 100 years. Despite the connotations of the name "return period".