Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Robert Kelly is managing director of XTS ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Conflict theory is an idea presented by Karl Marx that suggests competition for resources keeps people in conflict. Conflict theory offers one explanation for the struggle between socioeconomic groups ...

Traders and investors are constantly searching for methods to increase earnings, reduce risks, and outperform the market’s average returns. As a result, several theories have been proposed to explain ...