Sam Sharpe executed and delivered to Don Dole the following instrument:
Knoxville, Tennessee May 29, 2021
Thirty days after date I promise to pay Don Dole or order, Five Thousand Dollars. The holder of this Thirty days after date I promise to pay Don Dole or order, Five Thousand Dollars. The holder of this instrument shall have the election to require the assignment and delivery to him of my 100 shares of Brookside Iron Works Corporation stock in lieu of the payment of Five Thousand Dollars in money.

Is this instrument negotiable? Explain.