Mean variance analysis is a component of modern portfolio theory, which assumes investors make rational decisions, and that for increased risk they expect a higher return. Next Up.
sitâ²-in`. 1. an organized passive protest against racial segregation in which the demonstrators occupy seats prohibited to them in public places. 2. any organized protest in which the demonstrators occupy and refuse to leave a public place.
1 2 [transitive] sit somebody + adv./prep. to put somebody in a sitting position He lifted the child and sat her on the wall. 2  She sat him down in front of the fire with a hot drink. 3  3 [intransitive] to be in a particular place + adv./prep. 4  A large bus was sitting outside.