Binomial tree and its graphic presentation
The binomial tree method was proposed by Cox, Ross, and Robinstein in 1979. Because of this, it is also called the CRR method. Based on the CRR method, we have the following two-step approach. First, we draw a tree, such as the following one-step tree. Assume that our current stock value is S. Then, there are two outcomes of Su and Sd, where u>1 and d<1, see the following code:
import matplotlib.pyplot as plt plt.xlim(0,1) plt.figtext(0.18,0.5,'S') plt.figtext(0.6,0.5+0.25,'Su') plt.figtext(0.6,0.5-0.25,'Sd') plt.annotate('',xy=(0.6,0.5+0.25), xytext=(0.1,0.5), arrowprops=dict(facecolor='b',shrink=0.01)) plt.annotate('',xy=(0.6,0.5-0.25), xytext=(0.1,0.5), arrowprops=dict(facecolor='b',shrink=0.01)) plt.axis('off') ...Get Python for Finance - Second Edition now with the O’Reilly learning platform.
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