At maturity T, the holder of a "square-or-nothing" call option written on an underlying St receives a payoff of the form ϕ(ST)=S2TK11{ST≥K}={S2TK, if ST≥K,0,otherwise.
Assume a Black-Scholes diffusion framework where the underlying's risk-neutral drift μ and volatility σ are given.
Can one derive a closed-form pricing formula for such an option?
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