Quote from Random.Capital:
Assume for the moment that we know how to price an arbitrary binary option. Can't we view a vanilla option as a collection of (hypothetical) binary options at different strikes, with different payoffs? Payoff would then be an integration along the strike price axis, from 0 to Price@Expiry.
Thinking out loud here...a perfect hedge for a binary with strike $X and a payout of $1.00 could be made with a call spread at $X and $X + $0.01. The price of that spread should equal the price of the binary divided by 100 ($1 = 100*$0.01).
Anyway, I'm meandering now...and looking forward to a possible SuperClassico Ultra-Retro Germany-Holland rematch in the final.![]()
You can't replicate the convexity, even at penny strikes, but you can get close. Empirically, it's been done to replicate lookback exotics with a touch option strip.
