At first blush, stock trading this week is hardly a paragon of the market-efficiency theory, an oft-romanticized idea in Economics 101. After all, big equity gauges plunged on Monday, spurred by fears ...

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 ...

Forbes contributors publish independent expert analyses and insights. Carrie McCabe reports on asset management, strategy, and investing. In his September 2024 paper, The Less-Efficient Market ...

The Efficient Market Hypothesis (EMH) has retreated from bold claims of efficiency to a weaker defense that abandons its original claims. The "nihilist defense" simply asserts most active managers ...

CHICAGO, Sept. 17, 2025 /PRNewswire/ -- Hull Tactical, a pioneer in quantitative investment strategies, today announced the launch of its Kaggle competition: Hull Tactical Market Prediction, an ...

Weak form market efficiency is a concept that suggests past stock prices and trading volumes do not predict future stock prices. In a weak form efficient market, all historical information is already ...

Soros made $1 billion by shorting the British pound in 1992. His fund, Quantum Fund, outperformed the S&P 500 with 20% annual returns. Soros' investment philosophy -- reflexivity -- challenges ...

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 ...