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  2. Volatility (finance) - Wikipedia

    en.wikipedia.org/wiki/Volatility_(finance)

    CBOE Volatility Index (VIX) from December 1985 to May 2012 (daily closings) In finance, volatility (usually denoted by "σ") is the degree of variation of a trading price series over time, usually measured by the standard deviation of logarithmic returns. Historic volatility measures a time series of past market prices.

  3. Realized variance - Wikipedia

    en.wikipedia.org/wiki/Realized_variance

    The realized volatility is the square root of the realized variance, or the square root of the RV multiplied by a suitable constant to bring the measure of volatility to an annualized scale. For instance, if the RV is computed as the sum of squared daily returns for some month, then an annualized realized volatility is given by 252 × R V ...

  4. Forward volatility - Wikipedia

    en.wikipedia.org/wiki/Forward_volatility

    The volatilities in the market for 90 days are 18% and for 180 days 16.6%. In our notation we have , = 18% and , = 16.6% (treating a year as 360 days). We want to find the forward volatility for the period starting with day 91 and ending with day 180.

  5. How implied volatility works with options trading

    www.aol.com/finance/implied-volatility-works...

    Calculating fair value: By comparing implied volatility with historical volatility, you can determine whether an option is fairly priced. If IV is significantly higher than HV, it may suggest that ...

  6. Average true range - Wikipedia

    en.wikipedia.org/wiki/Average_true_range

    Average true range (ATR) is a technical analysis volatility indicator originally developed by J. Welles Wilder, Jr. for commodities. [1] [2] The indicator does not provide an indication of price trend, simply the degree of price volatility. [3] The average true range is an N-period smoothed moving average (SMMA) of the true range values. Wilder ...

  7. PnL explained - Wikipedia

    en.wikipedia.org/wiki/PnL_Explained

    Column 6: Impact of interest rates – This is the PnL due to changes in interest rates; Column 7: Impact of volatility – This is the PnL due to changes in volatilities. Volatilities are used to value option (finance) (i.e., calls and puts) Column 8: Impact of new trades – PnL from trades done on the current day

  8. Bollinger Bands - Wikipedia

    en.wikipedia.org/wiki/Bollinger_Bands

    When the bands lie close together, a period of low volatility is indicated. [5] Conversely, as the bands expand, an increase in price action/market volatility is indicated. [ 5 ] When the bands have only a slight slope and track approximately parallel for an extended time, the price will generally be found to oscillate between the bands as ...

  9. Local volatility - Wikipedia

    en.wikipedia.org/wiki/Local_volatility

    A local volatility model, in mathematical finance and financial engineering, is an option pricing model that treats volatility as a function of both the current asset level and of time . As such, it is a generalisation of the Black–Scholes model , where the volatility is a constant (i.e. a trivial function of S t {\displaystyle S_{t}} and t ...