Imperfect competition is a market structure where the assumptions of perfect competition are not met. This market structure is more reflective of real-world scenarios, where companies have some ...

And while the stock market isn't a perfect representation of the overall economy, experts say even U.S. households that don't hold stock should keep an eye on its swings.

The prospect of a bear market, and the pessimistic investment environment that it entails, carry disconcerting near-term implications. In the 26 bear markets since 1929, the S &P 500 — the index ...