BREAKING DOWN 'Mean-Variance Analysis'. There are two major factors in mean variance analysis: variance and expected return. 1  Variance represents how spread out the data set numbers are, such as the variability in daily or weekly returns of an individual security. 2  The expected return is a subjective probability assessment on the return of the stock.
A sitcom is a situation comedy.. It's used to describe a TV or radio show with a set cast of characters that find themselves in humorous or unusual situations. A sitcom is a situation comedy.. It's used to describe a TV or radio show with a set cast of characters that find themselves in humorous or unusual situations.
A prequel is a literary, dramatic, or filmic work whose story precedes that of a previous work, by focusing on events that occur before the original narrative. A prequel is a work that forms part of a back-story to the preceding work. All prequels are, by definition, essentially sequels in that they expand on a previous or preceding work.. The term is a 20th-century neologism that is a portmanteau of the prefix pre- (from Latin prae, before) and sequel.