Explain whether the following statements are true or false.

a. Derivative transactions are designed to increase risk and are used almost exclusively by speculators who are looking to capture high returns.

b. Hedge funds generally charge higher fees than mutual funds.

c. Hedge funds have traditionally been highly regulated.

d. The New York Stock Exchange is an example of a stock exchange that has a physical location.

e. A larger bid-ask spread means that the dealer will realize a lower profit. 

f. The efficient market hypothesis assumes that all investors are rational.