What if r is not 0
insert (1+r) * trident symbol into 2 eps for diff prices but not end step 2 price deriv=price combo one
What if r is not 0 and continuous compounding?
(e^r*t) * trident
what can go wrong in calculations?
possible values of share price on expiry date can be different than expected
model dependence
relying on info from the market which was wrong
three-period model
break up into multiple 2-period models
dynamic replication
switching between combos
self-financing strategy
switching combos doesn’t cost $
3 continuous time models
two period
binomial tree
continuous tree