When investment banks buy or sell securities on their own account, it's called

In early 1996, the upper Midwest suffered record cold, with wind chills of fifty degrees below zero or worse. Yet, grocery stores stocked fresh citrus fruit (obviously not grown locally). Why did grocers stock the fruit?

a. the desire for profit b. concern for their neighbors c. the need to dispose of excess production d. government orders to distribute fruit e. All of the above are correct.

If the price of a good is below the shutdown point, a perfectly competitive firm earns zero profits

a. True b. False Indicate whether the statement is true or false