media mobile

media mobile
  Eng. miving average
  La media mobile è calcolata su un numero fisso di osservazioni di una determinata variabile economica, il cui valore cambia perché in ogni periodo entra nel range di calcolo la rilevazione più recente ed esce quella più vecchia. E' uno degli indicatori tecnici più utilizzati perchè serve ad individuare il trend principale depurandolo dagli effetti delle variazioni giornaliere dei prezzi. Inoltre gli investitori colgono segnali positivi quando il prezzo del titolo supera la sua media mobile. Esistono tre tipi di medie mobili, che differiscono per il diverso peso attribuito ad ogni singola osservazione: media mobile semplice, ponderata ed esponenziale.

Glossario di economia e finanza. 2011.

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