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Derivati
Derivati
Il compratore della call è un rialzista sia che
intenda vendere sia che intenda esercitare
l'opzione
Derivati
La cessione del contratto (Ct1) ad un prezzo
maggiore di quello iniziale (Ct) consente di
ottenere un profitto pari alla...
Derivati
...differenza dei due premi
P(>0) = Ct1 - Ct
Derivati
L'esercizio a scadenza permette di realizzare un
guadagno netto se...
Derivati
...la quotazione della call (CT) è maggiore di
quella al momento dell'acquisto (Ct)
P(>0) = CT > Ct
Derivati
Il compratore della call, sia che chiuda la
posizione prima del termine, sia che eserciti a
scadenza, realizza un profitto se...
Derivati
...il prezzo dell'opzione aumenta
Derivati
Il compratore della call acquista la volatilità e la
“direzione” al rialzo del prezzo del sottostante
Derivati
NB: in assenza di dividendi, non essendo
conveniente l'esercizio prima della scadenza, la
call americana vale quella europea
Derivati
La call al termine vale il valore intrinseco
Derivati
La call prima della scadenza vale la somma del
valore intrinseco e di quello estrinseco
Derivati
Perchè il prezzo dell'opzione all'istante T sia
aumentato è necessario che la quotazione
dell'azione sia maggiore del prezzo e del
valore estrinseco iniziali
Derivati
Tradotto in formula
(PAT – PE) > (PAt – PE) + time value
Derivati
Ovvero
PAT > PAt + time value
Derivati
Sia che l'opzione sia ceduta o esercitata a
scadenza, il prezzo dell'azione deve aumentare
per...
Derivati
...compensare la diminuzione o l'azzeramento del
valore estrinseco
Derivati
Si noti che stiamo ignorando l'effetto sul prezzo
della call di un aumento della volatilità o del
tasso di interesse
Derivati
Il compratore della call perde non solo se la
quotazione del sottostante diminuisce ma anche
se...
Derivati
...rimane stabile o cresce poco
PAT – PE > PAt – PE + time value
Derivati
Ovvero
PAT - PAt > time value
Derivati
Quindi il compratore della call realizza un profitto
netto se il prezzo dell'azione aumenta tanto da
compensare la diminuzione o l'azzeramento del
valore estrinseco
Derivati
A scadenza, se l'opzione è in the money, il
compratore della call realizza un profitto netto se il
prezzo della call è aumentato e quindi se... la
quotazione dell'azione è maggiore dalla base più
il costo dell'opzione
Derivati
... la quotazione dell'azione è maggiore della
base più il costo dell'opzione

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