Which of the following statements about the Arbitrage Pricing Theory (APT) are correct? Check all that apply. The APT maintains that the realized return on any stock depends on changes unique to the firm. The APT identifies all relevant factors that affect the realized returns on stocks. The APT model maintains that the realized returns on stocks depend on unexpected changes in fundamental economic factors. The APT is more general than the Capital Asset Pricing Model (CAPM).

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.