Muroi, Yoshifumi; Yamada, Takashi - Society for Computational Economics - SCE - 2006
The pricing problem of options with an early exercise feature, such as American options, is one of the important topics … in mathematical finance. The pricing formulas for American options, however, have not been found in general and the …. Although the closed form pricing formula for perpetual American options in the Black and Scholes economy is known explicitly …