The Index of Consumer Sentiment (ICS) is a monthly US household survey from the University of Michigan Surveys of Consumers, started in 1946. It covers adults 18 and older in the coterminous United States, the 48 states plus the District of Columbia, using a rotating panel. Each month asks about 50 questions of some 1000 interviews, but ICS uses 5, split into Current Conditions (ICC) and Expectations (ICE). It tracks opinions, not spending or inflation, and differs from its own inflation series and the Conference Board survey.