719 American put valuation prior to Maturity Date Figure 7.2(. 177) American Put Option Price P≥Ⅹ-S A Stock price, S As o or Increases, the put price moves in the direction of the arrows Options, Futures, and Other Derivatives, 4th edition@ 2000 by John C. Hull Tang Yincai, Shanghai Normal UniversityOptions, Futures, and Other Derivatives, 4th edition © 2000 by John C. Hull Tang Yincai, Shanghai Normal University 7.19 American Put Valuation Prior to Maturity Date • Figure 7.2 (p. 177) AmericanPut Option Price A X Stock price, S As  or T increases, the put price moves in the direction of the arrows • 0 P  X − S