Answer:
1. What will be the value of your portfolio in January (net of the proceeds from the options) if the stock price ends up at:
(a) $30 ⇒ $170,000
(b) $40 ⇒ $195,000
(c) $50 ⇒ $220,000
call strike price $45
call premium received $2
put strike price $35
put premium paid $3
you pay $2 - $3 = -$1
stock price
$30 $40 $50
stock value $30 $40 $50
put value $5 - -
call value - - -$5
premium paid -$1 -$1 -$1
net stock value $34 $39 $44
total # of stocks 5,000 5,000 5,000
portfolio's value $170,000 $195,000 $220,000
2. Compare these proceeds to what you would realize if you simply continued to hold the shares.
if you hold the stocks:
(a) $30 ⇒ $150,000 - $170,000 = -$20,000 (you gain by using a collar)
(b) $40 ⇒ $200,000 - $195,000 = $5,000 (you lose by using a collar)
(c) $50 ⇒ $250,000 - $220,000 = $30,000 (you lose by using a collar)