In Swheser book it states that that when stock price increase, delta of call option increase?
Should it be inversed since:
From dC = delta*dS we have delta = dC/dS so if stock price increase we have dS increased then delta should decrease?
In Swheser book it states that that when stock price increase, delta of call option increase?
Should it be inversed since:
From dC = delta*dS we have delta = dC/dS so if stock price increase we have dS increased then delta should decrease?
Remember though that when stock price increase the value of a call option increases too. Since the dC in the numerator increases by a larger percentage that the dS in the denominator, delta increases overall. I like to think of it in terms of the graph in Schweser notes that shows the pre-expiration post-expiration payoff of a call option. As stock price increases, the slope of the pre-expiration payoff becomes steeper i.e. delta becomes larger.
excellent! thanks for the very good answer!
yes but up until delta=1.0, then it no longer increases, no matter how much the stock increases…just to be a little picky
Yes that’s right. Call delta is bound by 0 and +1 while put delta is bound by -1 and 0.