Jacob gives stock (basis of $900,000 and fair market value of $2,200,000 to mandy. as a result of the transfer, jacob paid a gift tax of $90,000.

This question is incomplete and I've read and answered the complete question and its ask to determine Mandy's gain or loss if she later sells the stock for $2.3 million. 

In definition, a fair market value is the selling price of the item of which buyer and seller can agree, with that, if Mandy sold it for 2.3 million, the possible profit of it would be $100,000

The business cycle is the periodic but irregular up-and-down movement in economic activity, measured by fluctuations in real gross domestic product (gdp) and other macroeconomic variables. a business cycle is typically characterized by four phases—recession, recovery, growth, and decline—that repeat themselves over time. economists note, however, that complete business cycles vary in length. the duration of business cycles can be anywhere from about two to twelve years, with most cycles averaging six years in length. some business analysts use the business cycle model and terminology to study and explain fluctuations in business inventory and other individual elements of corporate operations. but the term "business cycle" is still primarily associated with larger (industry-wide, regional, national, or even international) business trends.