Dave is a stock broker. Pam is one of his clients. Pam gives Dave $100,000 and asks Dave to use all of the money to buy Apple stock. Dave thinks that Apple is a bad investment and buys a new tech start-up, Pear for Pam instead. Apple and Pear introduce phones on the same day. Apple's phone is a hit and Pear's phone is a disaster. Apple's stock price doubles and Pear goes out of business.

What rights does Pam have against Dave?