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GYOOCHEOL SHIM 한국산업응용수학회 2011 Journal of the Korean Society for Industrial and A Vol.15 No.1
I introduce a derivative called “Snowball Currency Option” or “USDKRWSnowball Extendible At Expiry KO” which was traded once in the over-the-counter market in Korea. A snowball currency option consists of a series of maturities the payoffs at which are like those of a long position in a put option and two short position in an otherwise identical call. The strike price at each maturity depends on the exchange rate and the previous strike price so that the strike prices are random and path-dependent, which makes it difficult to find a closed form solution of the value of a snowball currency option. I analyze the payoff structure of a snowball currency option and derive an upper and a lower boundaries of the value of it in a simplified model. Furthermore, I derive a pricing formula using integral in the simplified model.