Mainstream economics and finance theories hold that markets immediately adjust to new information. While market prices do ...

Lucas Downey is the co-founder of MAPsignals.com, and an Investopedia Academy instructor. Gordon Scott has been an active investor and technical analyst or 20+ years. He is a Chartered Market ...

I began this article with the goal of addressing an academic notion, the efficient-market hypothesis, or EMH. My research dissuaded me. In one University of Chicago article, a faculty member questions ...

The efficient market hypothesis theory states that the market prices securities fairly and efficiently, and investors are unable to outperform the market consistently. Moreover, EMH theory proposes ...

Active managers sometimes tout their ability to select stocks in markets that are considered less informationally efficient and those that offer larger rewards to successful stock pickers. When stock ...

The Efficient Market Hypothesis stated across all markets simultaneously is false, but there is a lot of nuance, and there are numerous nuanced violations worth knowing about. Whether the EMH is true ...

Journal Editorial Report: The week's best and worst from Kim Strassel, Bill McGurn and Dan Henninger. Images: Bloomberg News/AFP/Getty Images Composite: Mark Kelly The evolution of artificial ...

Stock picker Ken Farsalas at Oberweis Asset Management is proving that the best way to trounce index funds is to fill your portfolio up with little known, earnings-beating companies. Eugene Fama, ...